From 25a7d35f365b8bb452bd24c702de8f3089d6b566 Mon Sep 17 00:00:00 2001 From: arielherself Date: Thu, 26 Dec 2024 02:52:49 +0800 Subject: [PATCH] regular backup --- .gitmodules | 3 + src/bin/abc-385f.cc | 598 ++++++++++++++++++++++++++++++++++ src/bin/abc-385f.py | 29 ++ src/bin/cf-2044g2.cc | 751 +++++++++++++++++++++++++++++++++++++++++++ src/bin/cf-2044h.cc | 591 ++++++++++++++++++++++++++++++++++ src/bin/cf-837f.cc | 637 ++++++++++++++++++++++++++++++++++++ src/bin/cf-840c.cc | 624 +++++++++++++++++++++++++++++++++++ src/bin/cf-840d.cc | 623 +++++++++++++++++++++++++++++++++++ src/bin/cf-855d.cc | 684 +++++++++++++++++++++++++++++++++++++++ src/bin/cf-858f.cc | 660 +++++++++++++++++++++++++++++++++++++ src/bin/cf-863f.cc | 690 +++++++++++++++++++++++++++++++++++++++ src/bin/cf-865c.cc | 587 +++++++++++++++++++++++++++++++++ src/bin/cf-868f.cc | 0 src/bin/cf-869e.cc | 617 +++++++++++++++++++++++++++++++++++ src/bin/cf-873e.cc | 644 +++++++++++++++++++++++++++++++++++++ src/bin/cf-873f.cc | 656 +++++++++++++++++++++++++++++++++++++ src/bin/cf-875e.cc | 600 ++++++++++++++++++++++++++++++++++ src/bin/cf-877f.cc | 673 ++++++++++++++++++++++++++++++++++++++ src/bin/cf-878b.cc | 0 src/bin/cf-884e.cc | 613 +++++++++++++++++++++++++++++++++++ src/bin/cf-884f.cc | 675 ++++++++++++++++++++++++++++++++++++++ src/bin/cf-888f.cc | 609 +++++++++++++++++++++++++++++++++++ src/bin/cp-templates | 1 + src/bin/lg-3804.cc | 653 +++++++++++++++++++++++++++++++++++++ src/bin/std.in | 5 +- src/bin/template.cc | 37 ++- src/bin/test.cc | 21 +- src/bin/test.py | 8 +- 28 files changed, 12260 insertions(+), 29 deletions(-) create mode 100644 .gitmodules create mode 100644 src/bin/abc-385f.cc create mode 100644 src/bin/abc-385f.py create mode 100644 src/bin/cf-2044g2.cc create mode 100644 src/bin/cf-2044h.cc create mode 100644 src/bin/cf-837f.cc create mode 100644 src/bin/cf-840c.cc create mode 100644 src/bin/cf-840d.cc create mode 100644 src/bin/cf-855d.cc create mode 100644 src/bin/cf-858f.cc create mode 100644 src/bin/cf-863f.cc create mode 100644 src/bin/cf-865c.cc create mode 100644 src/bin/cf-868f.cc create mode 100644 src/bin/cf-869e.cc create mode 100644 src/bin/cf-873e.cc create mode 100644 src/bin/cf-873f.cc create mode 100644 src/bin/cf-875e.cc create mode 100644 src/bin/cf-877f.cc create mode 100644 src/bin/cf-878b.cc create mode 100644 src/bin/cf-884e.cc create mode 100644 src/bin/cf-884f.cc create mode 100644 src/bin/cf-888f.cc create mode 160000 src/bin/cp-templates create mode 100644 src/bin/lg-3804.cc diff --git a/.gitmodules b/.gitmodules new file mode 100644 index 0000000..4f323d5 --- /dev/null +++ b/.gitmodules @@ -0,0 +1,3 @@ +[submodule "src/bin/cp-templates"] + path = src/bin/cp-templates + url = https://git.subc.rip/subcrip/cp-templates diff --git a/src/bin/abc-385f.cc b/src/bin/abc-385f.cc new file mode 100644 index 0000000..314fda5 --- /dev/null +++ b/src/bin/abc-385f.cc @@ -0,0 +1,598 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +// #pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +// __attribute__((target("popcnt"))) +void solve() { + using ld = __float128; + read(int, n); + readvec(pii, a, n); + auto check = [&] (ld b) -> bool { + ld prev = -INFLL; + for (auto&& [x, h] : a) { + ld curr = (h - b) / x; + if (curr > prev) { + prev = curr; + } else { + return false; + } + } + return true; + }; + if (check(0)) { + cout << -1 << '\n'; + return; + } + ld l = 0, r = 2e18; + + while (r - l > 1e-10) { + ld mid = l + (r - l) / 2; + if (check(mid)) { + r = mid; + } else { + l = mid; + } + } + cout << fixed << setprecision(50) << (long double)(l) << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/abc-385f.py b/src/bin/abc-385f.py new file mode 100644 index 0000000..c77222d --- /dev/null +++ b/src/bin/abc-385f.py @@ -0,0 +1,29 @@ +from decimal import Decimal +from sys import stdin +input = stdin.readline +n = int(input()) +a = [list(map(int, input().split(' '))) for _ in range(n)] +def check(b): + prev: Decimal = Decimal(-10 ** 18) + for x, h in a: + curr: Decimal = (h - b) / x + if curr > prev: + prev = curr + else: + return False + return True +if check(0): + print(-1) + exit(0) +l = Decimal(0) +r = Decimal(10 ** 18) +cnt = 0 +while r - l > 1e-10: + cnt += 1 + mid = l + (r - l) / 2 + if check(mid): + r = mid + else: + l = mid +print(l) +print(cnt) \ No newline at end of file diff --git a/src/bin/cf-2044g2.cc b/src/bin/cf-2044g2.cc new file mode 100644 index 0000000..dcf8b87 --- /dev/null +++ b/src/bin/cf-2044g2.cc @@ -0,0 +1,751 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid cyclic dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +// #define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +namespace tarjan { + struct mutex_cond { + int v1; bool cond1; + int v2; bool cond2; + mutex_cond(int v1, bool cond1, int v2, bool cond2) : v1(v1), cond1(cond1), v2(v2), cond2(cond2) {} + }; + struct inclusive_cond { + int v1; bool cond1; + int v2; bool cond2; + inclusive_cond(int v1, bool cond1, int v2, bool cond2) : v1(v1), cond1(cond1), v2(v2), cond2(cond2) {} + }; + // Returns the mapping between vertices and their affiliated sccs. + vector scc(const vector>& ch) { + int n = ch.size(); + int cnt = 0, scn = 0; + vector dfn(n), low(n), vis(n), st; + vector br(n); + auto tarjan = [&] (auto tarjan, int v) -> void { + dfn[v]=low[v]=++cnt; + st.push_back(v); + vis[v]=1; + for(const auto&u:ch[v]) + if(!dfn[u]) tarjan(tarjan, u),low[v]=min(low[v],low[u]); + else if(vis[u])low[v]=min(low[v],dfn[u]); + if(dfn[v]==low[v]){ + ++scn; + int u; + do u=st.back(), st.pop_back(),vis[u]=0,br[u]=scn; while(u!=v); + } + }; + for (int i = 0; i < n; ++i) { + if (!dfn[i]) { + tarjan(tarjan, i); + } + } + return br; + } + // This method can eliminate redundant edges or self-loops + vector> build_scc(const vector>& ch) { + int n = ch.size(); + auto br = scc(ch); + int cnt = *max_element(br.begin(), br.end()); + vector> rb(cnt + 1); + for (int i = 0; i < n; ++i) { + for (auto&& u : ch[i]) { + if (br[i] != br[u]) rb[br[i]].emplace(br[u]); + } + } + vector> res(cnt + 1); + for (int i = 1; i <= cnt; ++i) { + res[i] = vector(rb[i].begin(), rb[i].end()); + } + return res; + } + + // This method can eliminate redundant edges or self-loops + // return form: (scc size, children of scc) + vector>> build_scc_with_size(const vector>& ch) { + int n = ch.size(); + auto br = scc(ch); + int cnt = *max_element(br.begin(), br.end()); + vector> rb(cnt + 1); + for (int i = 0; i < n; ++i) { + for (auto&& u : ch[i]) { + if (br[i] != br[u]) rb[br[i]].emplace(br[u]); + } + } + vector>> res(cnt + 1); + for (int i = 1; i <= cnt; ++i) { + res[i].second = vector(rb[i].begin(), rb[i].end()); + } + for (int i = 1; i <= n; ++i) { + res[br[i]].first += 1; + } + return res; + } + // indices start from 1, result has `n` items + optional> solve_twosat(int n, const vector& conditions) { + vector> ch(2 * n + 1); + for (auto&& [v1, cond1, v2, cond2] : conditions) { + ch[(1 ^ cond1) * n + v1].emplace_back(cond2 * n + v2); + ch[(1 ^ cond2) * n + v2].emplace_back(cond1 * n + v1); + } + auto sccno = scc(ch); + for (int i = 1; i <= n; ++i) { + if (sccno[i] == sccno[i + n]) { + return nullopt; + } + } + vector res; + for (int i = 1; i <= n; ++i) { + if (sccno[i] < sccno[i + n]) { + res.emplace_back(false); + } else { + res.emplace_back(true); + } + } + return res; + }; + // indices start from 1, result has `n` items + optional> solve_twosat(int n, const vector& conditions) { + vector trans_conds; + for (auto&& [v1, cond1, v2, cond2] : conditions) { + trans_conds.emplace_back(v1, cond1, v2, not cond2); + } + return solve_twosat(n, trans_conds); + } + + // Returns if each vertex is a cut vertex + // All indices start from 1 + vector cut_v(const vector>& ch) { + int n = ch.size() - 1; + vector vis(n + 1); + vector low(n + 1), dfn(n + 1), flag(n + 1); + int cnt = 0; + auto dfs = [&] (auto dfs, int v, int pa) -> void { + vis[v] = 1; + low[v] = dfn[v] = ++cnt; + int child = 0; + for (auto&& u : ch[v]) { + if (not vis[u]) { + ++child; + dfs(dfs, u, v); + low[v] = min(low[v], low[u]); + if (pa != v and low[u] >= dfn[v] and not flag[v]) { + flag[v] = 1; + } + } else if (u != pa) { + low[v] = min(low[v], dfn[u]); + } + } + if (pa == v and child >= 2 and not flag[v]) { + flag[v] = 1; + } + }; + for (int i = 1; i <= n; ++i) { + if (not dfn[i]) { + dfs(dfs, i, 0); + } + } + return flag; + } +} + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n); + readvec1(int, nxt, n); + vector scc; + { + adj(ch, n); + for (int i = 1; i <= n; ++i) { + Edge(ch, i, nxt[i]); + } + scc = tarjan::scc(ch); + } + int m = *max_element(scc.begin(), scc.end()); + adj(ch, m); + vector ind(m + 1); + for (int i = 1; i <= n; ++i) { + if (scc[i] == scc[nxt[i]]) { + continue; + } + Edge(ch, scc[i], scc[nxt[i]]); + ind[scc[nxt[i]]] += 1; + } + vector dp(m + 1); + deque q; + for (int i = 0; i <= m; ++i) { + if (ind[i] == 0) { + q.emplace_back(i); + } + } + while (q.size()) { + int v = popfront(q); + for (auto&& u : ch[v]) { + if (ch[u].empty()) { + chmax(dp[u], dp[v] + 1); + } else { + dp[u] += dp[v] + 1; + } + if (--ind[u] == 0) { + q.emplace_back(u); + } + } + } + cout << 2 + *max_element(dp.begin(), dp.end()) << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-2044h.cc b/src/bin/cf-2044h.cc new file mode 100644 index 0000000..3d164ff --- /dev/null +++ b/src/bin/cf-2044h.cc @@ -0,0 +1,591 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid cyclic dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +// #define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n, q); + vector a(n, vector(n)); + for (int i = 0; i < n; ++i) { + for (int j = 0; j < n; ++j) { + cin >> a[i][j]; + } + } + vector f(n + 1, vector(n + 1)); + vector g(n + 1, vector(n + 1)); + vector h(n + 1, vector(n + 1)); + for (int i = 1; i <= n; ++i) { + for (int j = 1; j <= n; ++j) { + f[i][j] = f[i - 1][j] + f[i][j - 1] - f[i - 1][j - 1] + a[i - 1][j - 1]; + g[i][j] = g[i - 1][j] + g[i][j - 1] - g[i - 1][j - 1] + a[i - 1][j - 1] * (i - 1); + h[i][j] = h[i - 1][j] + h[i][j - 1] - h[i - 1][j - 1] + a[i - 1][j - 1] * (j - 1); + } + } + while (q--) { + read(int, x1, y1, x2, y2); + --x1, --x2, --y1, --y2; + ll p = h[x2 + 1][y2 + 1] - h[x1][y2 + 1] - h[x2 + 1][y1] + h[x1][y1] - (y1 - 1) * (f[x2 + 1][y2 + 1] - f[x1][y2 + 1] - f[x2 + 1][y1] + f[x1][y1]); + ll q = (g[x2 + 1][y2 + 1] - g[x1][y2 + 1] - g[x2 + 1][y1] + g[x1][y1] - x1 * (f[x2 + 1][y2 + 1] - f[x1][y2 + 1] - f[x2 + 1][y1] + f[x1][y1])) * (y2 - y1 + 1); + cout << p + q << ' '; + } + cout << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-837f.cc b/src/bin/cf-837f.cc new file mode 100644 index 0000000..33f2a92 --- /dev/null +++ b/src/bin/cf-837f.cc @@ -0,0 +1,637 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = __float128; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll PRIMELL = 901017227882342239LL; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!((var) == (val))) (var) = (val); else +#define continue_or(var, val) __AS_PROCEDURE(if ((var) == (val)) continue; (var) = (val);) +#define break_or(var, val) __AS_PROCEDURE(if ((var) == (val)) break; (var) = (val);) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : (a)) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), (a).begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy((a).begin(), (a).end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy((a).begin() + 1, (a).end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy((a).begin(), (a).end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy((a).begin() + 1, (a).end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : (a)) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, (long double)(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(const string& s, const string& t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(const string& s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(int128(lhs.val) * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return lhs * mod(inverse(rhs.val, mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +using mll = MLL; +constexpr int N = 4e5 + 10; +mll fact[N]; + +void prep() { + fact[0] = fact[1] = 1; + for (int i = 2; i < N; ++i) { + fact[i] = fact[i - 1] * i; + } +} + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n); + read(ll, k); + vector a; + int f = 0; + for (int i = 0; i < n; ++i) { + read(int, x); + if (x == 0) { + if (f) { + a.emplace_back(x); + } + } else { + a.emplace_back(x); + f = 1; + } + } + n = a.size(); + if (*max_element(a.begin(), a.end()) >= k) { + cout << 0 << '\n'; + return; + } + if (n >= 4) { + int res = 0; + while (a[n - 1] < k) { + for (int i = 1; i < n; ++i) { + a[i] += a[i - 1]; + } + res += 1; + } + cout << res << '\n'; + } else { + auto work = [&] (ll x) { + x -= 1; + int128 res = 0; + // debug(x); + for (int i = 1; i <= n; ++i) { + int128 c = 1; + for (int j = 0; j < n - i; ++j) { + ll p = n - i + x - j, q = j + 1; + if (c * p > int128(1) * LLONG_MAX * q) { + return INT128_MAX; + } + c = c * p / q; + } + // deb(i, c); + res += c * a[i - 1]; + } + // debug(res); + return res; + }; + ll l = 1, r = INFLL; + while (l < r) { + ll mid = l + r >> 1; + if (work(mid) >= k) { + r = mid; + } else { + l = mid + 1; + } + } + cout << l << '\n'; + } +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-840c.cc b/src/bin/cf-840c.cc new file mode 100644 index 0000000..16618b2 --- /dev/null +++ b/src/bin/cf-840c.cc @@ -0,0 +1,624 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +using mll = MLL; +constexpr int N = 320; +mll fact[N], factrev[N + 1], s[N + 1]; + +void prep() { + fact[0] = factrev[0] = 1; + for (int i = 1; i < N; ++i) { + fact[i] = fact[i - 1] * i; + } + s[0] = 1; + for (int i = 1; i <= N; ++i) { + s[i] = s[i - 1] * fact[i - 1]; + } + factrev[N] = 1 / s[N]; + for (int i = N; i; --i) { + factrev[i - 1] = factrev[i] * fact[i - 1]; + } + for (int i = 0; i < N; ++i) { + factrev[i] = factrev[i + 1] * s[i]; + } +} + + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n); + readvec(int, a, n); + unordered_map cnt; + for (int i = 0; i < n; ++i) { + auto f = decompose_prime(a[i]); + int x = 1; + for (auto&& [v, c] : f) { + if (c % 2) { + x *= v; + } + } + cnt[x] += 1; + } + vector b; + for (auto&& [v, c] : cnt) { + b.emplace_back(c); + } + vector dp(n); + dp[0] = 1; + int tot = 0; + for (auto&& x : b) { + vector ndp(n); + for (int j = 1; j <= x; ++j) { + mll choice = fastcomb((x - j) + j - 1, x - j) * fact[x]; + int extra = x - j; + for (int k = 0; k < n; ++k) { + if (dp[k] == 0) continue; + for (int l = 0; l <= min(k, j); ++l) { + ndp[k - l + extra] += choice * dp[k] * fastcomb(k, l) * fastcomb(tot + 1 - k, j - l); + } + } + } + tot += x; + dp = std::move(ndp); + } + cout << dp[0] << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-840d.cc b/src/bin/cf-840d.cc new file mode 100644 index 0000000..42ad064 --- /dev/null +++ b/src/bin/cf-840d.cc @@ -0,0 +1,623 @@ +// re-run +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +// #pragma GCC optimize("O2,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +// __attribute__((target("popcnt"))) +void solve() { + constexpr int M = 60; + read(int, n, q); + readvec(int, a, n); + vector queries; + vector> open(n + 1); + vector> close(n + 1); + vector> seq(q); + unordered_map oc; + for (int i = 0; i < q; ++i) { + read(int, l, r, x); + --l, --r; + queries.emplace_back(l, r, x); + // if (oc.count({l, r})) { + // seq[i] = seq[oc[{l, r}]]; + // } else { + int nd = (r - l + 1) / x + 1; + for (int j = l; j <= r; j += nd) { + seq[i].emplace_back(a[j]); + } + // for (int j = 0; j < M; ++j) { + // int idx = rd() % (r - l + 1) + l; + // seq[i].emplace_back(a[idx]); + // } + // oc[{l, r}] = i; + // } + open[l].emplace_back(i); + close[r + 1].emplace_back(i); + } + vector cnt(n + 1); + vector res(q, INF); + // vector c(q, vector(M)); + vector> c(q); + for (int i = 0; i <= n; ++i) { + for (auto&& qi : open[i]) { + for (int j = 0; j < seq[qi].size(); ++j) { + // c[qi][j] = cnt[seq[qi][j]]; + c[qi].emplace_back(cnt[seq[qi][j]]); + } + } + for (auto&& qi : close[i]) { + auto&& [l, r, k] = queries[qi]; + for (int j = 0; j < seq[qi].size(); ++j) { + int val = seq[qi][j]; + if (cnt[val] - c[qi][j] > (r - l + 1) / k) { + chmin(res[qi], val); + } + } + } + if (i < n) { + cnt[a[i]] += 1; + } + } + replace(res.begin(), res.end(), INF, -1); + putvec_eol(res); +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-855d.cc b/src/bin/cf-855d.cc new file mode 100644 index 0000000..14e1959 --- /dev/null +++ b/src/bin/cf-855d.cc @@ -0,0 +1,684 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +string bin(T x) { + if (x == 0) { + return "0"; + } + string res; + while (x) { + res += (x & 1) + '0'; + x >>= 1; + } + return string(res.rbegin(), res.rend()); +} +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +struct LCA { + vector depth; + vector> pa; + LCA(const vector>& g, const vector& roots) { + int n = g.size() - 1; + int m = 32 - __builtin_clz(n); + depth.resize(n + 1); + pa.resize(n + 1, vector(m, -1)); + function dfs = [&](int x, int fa) { + pa[x][0] = fa; + for (int y: g[x]) { + if (y != fa) { + depth[y] = depth[x] + 1; + dfs(y, x); + } + } + }; + for (auto&& v : roots) { + dfs(v, 0); + } + + for (int i = 0; i < m - 1; i++) + for (int x = 1; x <= n; x++) + if (int p = pa[x][i]; p != -1) + pa[x][i + 1] = pa[p][i]; + } + + int get_kth_ancestor(int node, int k) { + for (; k; k &= k - 1) + node = pa[node][__builtin_ctz(k)]; + return node; + } + + int query(int x, int y) { + if (depth[x] > depth[y]) + swap(x, y); + y = get_kth_ancestor(y, depth[y] - depth[x]); + if (y == x) + return x; + for (int i = pa[x].size() - 1; i >= 0; i--) { + int px = pa[x][i], py = pa[y][i]; + if (px != py) { + x = px; + y = py; + } + } + return pa[x][0]; + } +}; + + + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n); + vector fa(n + 1); + adj(ch, n); + vector ps(n + 1); + for (int i = 1; i <= n; ++i) { + read(int, p, t); + if (p == -1) continue; + fa[i] = p; + edge(ch, i, p); + ps[i] = t == 0 ? (1LL << 32) : 1; + } + vector r(n + 1); + vector roots; + { + int root; + auto dfs = [&] (auto dfs, int v, int pa) -> void { + r[v] = root; + ps[v] += ps[pa]; + for (auto&& u : ch[v]) { + if (u == pa) continue; + dfs(dfs, u, v); + } + }; + for (int i = 1; i <= n; ++i) { + if (not fa[i]) { + roots.emplace_back(i); + root = i; + dfs(dfs, i, 0); + } + } + } + read(int, q); + LCA lca(ch, roots); + while (q--) { + read(int, t, u, v); + if (t == 1) { + if (u != v and r[u] == r[v] and lca.query(u, v) == u and ((ps[v] - ps[u]) & ((1LL << 32) - 1)) == 0) { + cout << "YES\n"; + } else { + cout << "NO\n"; + } + } else { + if (u != v and r[u] == r[v]) { + int l = lca.query(u, v); + if (l != v and ((ps[u] - ps[l]) & (1LL << 32) - 1) == 0 and (ps[v] - ps[l] >> 32) == 0) { + cout << "YES\n"; + continue; + } + } + cout << "NO\n"; + } + } +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-858f.cc b/src/bin/cf-858f.cc new file mode 100644 index 0000000..bfb0073 --- /dev/null +++ b/src/bin/cf-858f.cc @@ -0,0 +1,660 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = __float128; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!((var) == (val))) (var) = (val); else +#define continue_or(var, val) __AS_PROCEDURE(if ((var) == (val)) continue; (var) = (val);) +#define break_or(var, val) __AS_PROCEDURE(if ((var) == (val)) break; (var) = (val);) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : (a)) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), (a).begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy((a).begin(), (a).end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy((a).begin() + 1, (a).end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy((a).begin(), (a).end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy((a).begin() + 1, (a).end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : (a)) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, (long double)(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(const string& s, const string& t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(const string& s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +class quick_union { +private: + vector c, sz; +public: + quick_union(size_t n) : c(n), sz(n) { + iota(c.begin(), c.end(), 0); + sz.assign(n, 1); + } + size_t query(size_t i) { + if (c[i] != i) c[i] = query(c[i]); + return c[i]; + } + void merge(size_t i, size_t j) { + if (connected(i, j)) return; + sz[query(j)] += sz[query(i)]; + c[query(i)] = query(j); + } + bool connected(size_t i, size_t j) { + return query(i) == query(j); + } + size_t query_size(size_t i) { + return sz[query(i)]; + } +}; + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n, m); + vector edges; + quick_union qu(n + 1); + adj(ch, n); + for (int i = 0; i < m; ++i) { + read(int, u, v); + if (qu.connected(u, v)) { + edges.emplace_back(u, v); + } else { + qu.merge(u, v); + edge(ch, u, v); + } + } + vector depth(n + 1, -1); + vector fa(n + 1); + set cand; + vector cnt(n + 1); + { + auto dfs = [&] (auto dfs, int v, int pa) -> void { + fa[v] = pa; + depth[v] = depth[pa] + 1; + if (pa != 0) { + cand.emplace(depth[v], pa, v); + } + for (auto&& u : ch[v]) { + if (u == pa) continue; + cnt[qu.query(v)] += 1; + dfs(dfs, u, v); + } + }; + for (int i = 1; i <= n; ++i) { + if (depth[i] == -1) { + dfs(dfs, i, 0); + } + } + } + for (auto&& [u, v] : edges) { + if (depth[u] > depth[v]) swap(u, v); + cnt[qu.query(v)] += 1; + cand.emplace(depth[u] + 1, u, v); + } + vector res; + while (cand.size()) { + auto [d, u, v] = *cand.rbegin(); + cand.erase(prev(cand.end())); + cnt[qu.query(v)] -= 1; + if (cnt[qu.query(v)] > 0) { + if (get<1>(*cand.rbegin()) == u) { + // remove two leaves w-u-v + auto [d_, u_, w] = *cand.rbegin(); + cand.erase(prev(cand.end())); + res.emplace_back(w, u, v); + } else { + // remove one path fa[u]-u-v + assert(cand.count({depth[fa[u]] + 1, fa[u], u})); + cand.erase({depth[fa[u]] + 1, fa[u], u}); + res.emplace_back(fa[u], u, v); + } + cnt[qu.query(v)] -= 1; + } else { + // only one edge in the current CC + } + } + cout << res.size() << '\n'; + for (auto&& [u, v, w] : res) { + cout << u << ' ' << v << ' ' << w << '\n'; + } +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-863f.cc b/src/bin/cf-863f.cc new file mode 100644 index 0000000..86b489c --- /dev/null +++ b/src/bin/cf-863f.cc @@ -0,0 +1,690 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = __float128; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, (long double)(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +struct mcmf { + struct edge { + int to; + ll cap; + ll flow; + ll cost; + int rev; + int mark; + }; + vector> edges; + vector dis; + vector vis; + ll ret; + mcmf(int n) : edges(n + 1), dis(n + 1), vis(n + 1) {} + void add_edge(int from, int to, ll cap, ll cost, int mark = 0, int mark_rev = 0) { + edges[from].push_back({ to, cap, 0, cost, int(edges[to].size()), mark }); + edges[to].push_back({ from, 0, 0, -cost, int(edges[from].size() - 1), mark_rev }); + } + bool sp(int s, int t) { + dis.assign(edges.size(), INFLL); + dis[s] = 0; + int n = edges.size(); + int f = 1; + while (f) { + f = 0; + for (int i = 0; i < n; ++i) { + for (auto&& [to, cap, flow, cost, rev, mark] : edges[i]) { + if (cap > flow and dis[to] > dis[i] + cost) { + dis[to] = dis[i] + cost; + f = 1; + } + } + } + } + return dis[t] != INFLL; + } + ll dfs(int s, int t, ll cap) { + if (vis[s]) { + return 0; + } + vis[s] = 1; + if (s == t) { + return cap; + } + ll res = 0; + int n = edges[s].size(); + for (int i = 0; i < n; ++i) { + auto e = edges[s][i]; + if (e.cap > e.flow and dis[e.to] == dis[s] + e.cost) { + ll nw = dfs(e.to, t, min(cap - res, e.cap - e.flow)); + edges[s][i].flow += nw; + edges[e.to][e.rev].flow -= nw; + res += nw; + ret += nw * e.cost; + if (res == cap) { + return res; + } + } + } + return res; + } + // returns: (flow, cost) + pll run(int s, int t) { + ll res = 0; ret = 0; + while (sp(s, t)) { + vis.assign(edges.size(), 0); + ll curr = dfs(s, t, LLONG_MAX); + res += curr; + // BUG: this is a temporary fix of the infinite-looping issue observed + // when dealing with networks with negative weights. + if (curr == 0) break; + } + return { res, ret }; + } +}; + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n, q); + vector mx(n, n - 1), mn(n, 0); + while (q--) { + read(int, t, l, r, x); + --l, --r, --x; + if (t == 1) { + for (int j = l; j <= r; ++j) { + chmax(mn[j], x); + } + } else { + for (int j = l; j <= r; ++j) { + chmin(mx[j], x); + } + } + } + vector> choice(n); + for (int i = 0; i < n; ++i) { + for (int j = mn[i]; j <= mx[i]; ++j) { + choice[j].emplace_back(i); + } + } + mcmf net(3 * n + 10); + int oc = 1, val = n + 1, pos = 2 * n + 1; + int s = 3 * n + 8, t = 3 * n + 9; + for (int i = 0; i < n; ++i) { + net.add_edge(s, oc + i, INF, 0); + } + for (int i = 0; i < n; ++i) { + for (int j = 0; j < n; ++j) { + net.add_edge(oc + i, val + j, 1, 2 * i + 1); + } + } + for (int i = 0; i < n; ++i) { + for (auto&& j : choice[i]) { + net.add_edge(val + i, pos + j, 1, 0); + } + } + for (int i = 0; i < n; ++i) { + net.add_edge(pos + i, t, 1, 0); + } + auto [flow, cost] = net.run(s, t); + if (flow != n) { + cout << -1 << '\n'; + } else { + cout << cost << '\n'; + } +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-865c.cc b/src/bin/cf-865c.cc new file mode 100644 index 0000000..ffc2eda --- /dev/null +++ b/src/bin/cf-865c.cc @@ -0,0 +1,587 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n, r); + readvec((array), a, n); + vector dp(r + 1); + for (int i = 1; i <= n; ++i) { + auto&& [f, s, rawp] = a[i - 1]; + ld p = rawp / 100.; + vector ndp(r + 1, INFLL); + for (int j = 0; j <= r; ++j) { + if (j - f >= 0) { + chmin(ndp[j], dp[j - f] / p + f + (1 - p) / p * s); + } + if (j - s >= 0) { + chmin(ndp[j], dp[j - s] + p * f + (1 - p) * s); + } + } + dp = std::move(ndp); + debug(dp); + } + cout << fixed << setprecision(50) << dp[r] << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-868f.cc b/src/bin/cf-868f.cc new file mode 100644 index 0000000..e69de29 diff --git a/src/bin/cf-869e.cc b/src/bin/cf-869e.cc new file mode 100644 index 0000000..949ce0b --- /dev/null +++ b/src/bin/cf-869e.cc @@ -0,0 +1,617 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + safe_hash hasher; + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +template +struct BIT2d { + int n, m; + vector> c; + BIT2d(size_t n, size_t m) : n(n), m(m), c(n + 1, vector(m + 1)) {} + void add(size_t i, size_t j, const T& k) { + while (i <= n) { + size_t j1 = j; + while (j1 <= m) { + c[i][j1] xor_eq k; + j1 += lowbit(j1); + } + i += lowbit(i); + } + } + T getsum(size_t i, size_t j) { + T res = {}; + while (i) { + size_t j1 = j; + while (j1) { + res xor_eq c[i][j1]; + j1 -= lowbit(j1); + } + i -= lowbit(i); + } + return res; + } +}; + + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n, m, q); + BIT2d tr(n + 1, m + 1); + array_hash hasher; + while (q--) { + read(int, op, x1, y1, x2, y2); + if (op != 3) { + auto h = hasher(initializer_list{x1, y1, x2, y2}); + tr.add(x1, y1, h); + tr.add(x1, y2 + 1, h); + tr.add(x2 + 1, y1, h); + tr.add(x2 + 1, y2 + 1, h); + } else { + if (tr.getsum(x1, y1) == tr.getsum(x2, y2)) { + cout << "Yes\n"; + } else { + cout << "No\n"; + } + } + } +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-873e.cc b/src/bin/cf-873e.cc new file mode 100644 index 0000000..e3449df --- /dev/null +++ b/src/bin/cf-873e.cc @@ -0,0 +1,644 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +template> struct sparse_table { + _Op op; + vector> st; + sparse_table() {} + template + sparse_table(ReverseIterator __first, ReverseIterator __last, _Op&& __operation) { + op = __operation; + int n = distance(__first, __last); + st = vector>(n, vector<_Tp>(int(log2(n) + 1))); + int i = n - 1; + for (auto it = __first; it != __last; ++it) { + st[i][0] = *it; + for (int j = 1; i + (1 << j) <= n; ++j) { + st[i][j] = op(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]); + } + i -= 1; + } + } + _Tp query(size_t __start, size_t __end) { + int s = lg2(__end - __start + 1); + return op(st[__start][s], st[__end - (1 << s) + 1][s]); + } +}; + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n); + readvec(int, a, n); + vector idx(n); + iota(idx.begin(), idx.end(), 0); + sort_by_key(idx.begin(), idx.end(), expr(a[i], auto&& i), greater()); + vector diff(n); + for (int i = 0; i < n - 1; ++i) { + diff[i] = { a[idx[i]] - a[idx[i + 1]], i }; + } + diff[n - 1] = { a[idx[n - 1]], n - 1 }; + sparse_table rmq(diff.rbegin(), diff.rend(), functor(max)); + tiii varmax = { -1, -1, -1 }; + tiii mx = { -INF, -INF, -INF }; + for (int i = 0; i < n; ++i) { + for (int j = 0; j < i; ++j) { + // 0..j | j+1..i | i+1..n-1 + int l = j + 1, r = i - j; + if (l > r) swap(l, r); + if (r > 2 * l) continue; + int minlen = (r + 1) / 2, maxlen = 2 * l; + if (minlen > maxlen) continue; + int left = max(i + minlen, i + 1); + int right = min(i + maxlen, n - 1); + if (left > right) continue; + int x = a[idx[j]] - a[idx[j + 1]]; + int y = a[idx[i]] - a[idx[i + 1]]; + auto [z, zpos] = rmq.query(left, right); + // deb(i, j); + // deb(minlen, maxlen); + // deb(left, right); + // deb(x, y, z); + // deb(j, i, zpos); + tiii pos = { j, i, zpos }; + tiii curr = { x, y, z }; + if (chmax(mx, curr)) { + varmax = pos; + } + } + } + vector res(n); + auto&& [xpos, ypos, zpos] = varmax; + for (int i = 0; i <= xpos; ++i) { + res[idx[i]] = 1; + } + for (int i = xpos + 1; i <= ypos; ++i) { + res[idx[i]] = 2; + } + for (int i = ypos + 1; i <= zpos; ++i) { + res[idx[i]] = 3; + } + for (int i = zpos + 1; i < n; ++i) { + res[idx[i]] = -1; + } + putvec(res); +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-873f.cc b/src/bin/cf-873f.cc new file mode 100644 index 0000000..ec2b21c --- /dev/null +++ b/src/bin/cf-873f.cc @@ -0,0 +1,656 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid cyclic dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +template +struct SAM { + vector fa, len; + vector cloned; + vector cnt; + vector> ch; + vector valid; + int last; + int tot; + + int create(int _fa, int _len, bool _cloned, array&& _ch, bool _valid) { + fa.emplace_back(_fa); + len.emplace_back(_len); + cloned.emplace_back(_cloned); + ch.emplace_back(_ch); + valid.emplace_back(_valid); + return tot++; + } + + SAM(void) : fa(2), len(2), cloned(2), ch(2), valid(2), last(1), tot(2) {} + + void push_back(size_t c, bool valid) { + int p = last; + int nw = create(0, len[p] + 1, false, {}, valid); + + while (p != 0 and ch[p][c] == 0) { + ch[p][c] = nw; + p = fa[p]; + } + + if (p == 0) { + fa[nw] = 1; + } else { + int q = ch[p][c]; + if (len[q] == len[p] + 1) { + fa[nw] = q; + } else { + int nq = create(fa[q], len[p] + 1, true, array(ch[q]), false); + fa[nw] = fa[q] = nq; + while (p != 0 and ch[p][c] == q) { + ch[p][c] = nq; + p = fa[p]; + } + } + } + + last = nw; + } + + template + optional find(const basic_string& seq) { + int p = 1; + for (auto&& c : seq) { + if (ch[p][c] == 0) { + return nullopt; + } + p = ch[p][c]; + } + return p; + } + + // Fill `cnt` with the number of occurrences of each substring. + void populate(void) { + cnt.assign(tot, 0); + vector idx(tot); + iota(idx.begin(), idx.end(), 0); + sort_by_key(idx.begin(), idx.end(), expr(len[i], auto&& i), greater()); + for (auto&& v : idx) { + if (v > 1 and not cloned[v] and valid[v]) { + cnt[v] += 1; + } + cnt[fa[v]] += cnt[v]; + } + } +}; + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n); + read(string, s); + read(string, v); + SAM<26> sam; + for (int i = 0; i < n; ++i) { + sam.push_back(s[i] - 'a', v[i] == '0'); + } + sam.populate(); + ll res = 0; + for (int i = 0; i < sam.tot; ++i) { + // deb(sam.cnt[i], sam.len[i]); + chmax(res, ll(1) * sam.cnt[i] * sam.len[i]); + } + cout << res << endl; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-875e.cc b/src/bin/cf-875e.cc new file mode 100644 index 0000000..957577a --- /dev/null +++ b/src/bin/cf-875e.cc @@ -0,0 +1,600 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid circular dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n, s1, s2); + readvec1(int, pos, n); + pos[0] = s2; + auto check = [&] (int dis) -> bool { + set cand; + if (abs(s1 - s2) <= dis) { + cand.emplace(s1); + } + for (int i = 1; i <= n; ++i) { + // use the alternating pointer + if (cand.size() and abs(pos[i - 1] - pos[i]) <= dis) { + cand.emplace(pos[i - 1]); + } + // use the last pointer + // don't need to do anything + while (cand.size() and abs(*cand.begin() - pos[i]) > dis) { + cand.erase(cand.begin()); + } + while (cand.size() and abs(*cand.rbegin() - pos[i]) > dis) { + cand.erase(prev(cand.end())); + } + } + return cand.size(); + }; + int l = 0, r = INF; + while (l < r) { + int mid = l + r >> 1; + if (check(mid)) { + r = mid; + } else { + l = mid + 1; + } + } + cout << l << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-877f.cc b/src/bin/cf-877f.cc new file mode 100644 index 0000000..fdf1eb6 --- /dev/null +++ b/src/bin/cf-877f.cc @@ -0,0 +1,673 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid cyclic dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +template +vector mo(record_t& solver, const vector& queries, int n) { + int m = queries.size(); + int block = sqrt(ld(n)); + vector idx(m); + iota(idx.begin(), idx.end(), 0); + // sort_by_key(idx.begin(), idx.end(), expr(queries[i], int i)); + sort(idx.begin(), idx.end(), [&] (int i, int j) { + auto&& lhs = queries[i]; + auto&& rhs = queries[j]; + if (lhs.first / block != rhs.first / block) { + return lhs.first < rhs.first; + } + if (lhs.first / block % 2) { + return lhs.second < rhs.second; + } + return lhs.second > rhs.second; + }); // TODO: optimized sorting + vector res(m); + for (auto&& i : idx) { + auto&& [tl, tr] = queries[i]; + while (solver.l > tl) solver.movell(); + while (solver.r < tr) solver.moverr(); + while (solver.l < tl) solver.movelr(); + while (solver.r > tr) solver.moverl(); + res[i] = solver.get(); + } + return res; +} + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n, k); + readvec(int, t, n); + readvec(int, c, n); + struct { + using return_t = ll; + int l = 0, r = 0; // maintaining answer of range [l, r] + return_t res = 0; + vector me; + vector lt; + vector gt; + vector cnt; + int k; + return_t get(void) const { + return res; + } + void movell(void) { + l -= 1; + if (gt[l] != -1) { + res += cnt[gt[l]]; + } + cnt[me[l]] += 1; + } + void movelr(void) { + cnt[me[l]] -= 1; + if (gt[l] != -1) { + res -= cnt[gt[l]]; + } + l += 1; + } + void moverl(void) { + cnt[me[r]] -= 1; + if (lt[r] != -1) { + res -= cnt[lt[r]]; + } + r -= 1; + } + void moverr(void) { + r += 1; + if (lt[r] != -1) { + res += cnt[lt[r]]; + } + cnt[me[r]] += 1; + } + } solver; + vector ps(n + 1); + vector oc(n + 1); + for (int i = 1; i <= n; ++i) { + ps[i] = ps[i - 1] + (t[i - 1] == 1 ? 1 : -1) * c[i - 1]; + oc[i] = ps[i]; + } + sort(oc.begin(), oc.end()); + int m = unique(oc.begin(), oc.end()) - oc.begin(); + oc.resize(m); + solver.me.assign(n + 1, 0); + solver.lt.assign(n + 1, -1); + solver.gt.assign(n + 1, -1); + solver.cnt.assign(m, 0); + for (int i = 0; i <= n; ++i) { + solver.me[i] = lower_bound(oc.begin(), oc.end(), ps[i]) - oc.begin(); + { + auto it = lower_bound(oc.begin(), oc.end(), ps[i] - k); + if (it == oc.end() or *it != ps[i] - k); + else solver.lt[i] = it - oc.begin(); + } + { + auto it = lower_bound(oc.begin(), oc.end(), ps[i] + k); + if (it == oc.end() or *it != ps[i] + k); + else solver.gt[i] = it - oc.begin(); + } + } + solver.k = k; + solver.cnt[lower_bound(oc.begin(), oc.end(), 0) - oc.begin()] = 1; + read(int, q); + readvec(pii, queries, q); + transform(queries.begin(), queries.end(), queries.begin(), expr(pii(p.first - 1, p.second), auto&& p)); + vector res = mo(solver, queries, n); + putvec_eol(res); +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-878b.cc b/src/bin/cf-878b.cc new file mode 100644 index 0000000..e69de29 diff --git a/src/bin/cf-884e.cc b/src/bin/cf-884e.cc new file mode 100644 index 0000000..72e8209 --- /dev/null +++ b/src/bin/cf-884e.cc @@ -0,0 +1,613 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid cyclic dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n, m); + auto get = [&] (char c) { + if (c >= '0' and c <= '9') { + return c - '0'; + } else { + return 10 + c - 'A'; + } + }; + constexpr int N = 1 << 26; + bitset a; + for (int i = 0; i < n; ++i) { + read(string, s); + for (int j = 0; j < m / 4; ++j) { + int mask = get(s[j]); + for (int k = 0; k < 4; ++k) { + int bit = mask >> (3 - k) bitand 1; + a[i * m + j * 4 + k] = bit; + } + } + } + auto check = [&] (int i, int j) { return i >= 0 and i < n and j >= 0 and j < m; }; + auto dfs = [&] (auto dfs, int x, int y) -> void { + a[x * m + y] = 0; + for (auto&& [x1, y1] : initializer_list {{x - 1, y}, {x, y - 1}, {x + 1, y}, {x, y + 1}}) { + if (check(x1, y1) and a[x1 * m + y1]) { + dfs(dfs, x1, y1); + } + } + }; + int res = 0; + for (int i = 0; i < n; ++i) { + for (int j = 0; j < m; ++j) { + if (a[i * m + j]) { + deque q = {{ i, j }}; + while (q.size()) { + auto [x, y] = popfront(q); + for (auto&& [x1, y1] : initializer_list {{x - 1, y}, {x, y - 1}, {x + 1, y}, {x, y + 1}}) { + if (check(x1, y1) and a[x1 * m + y1]) { + q.emplace_back(x1, y1); + } + } + } + res += 1; + } + } + } + cout << res << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-884f.cc b/src/bin/cf-884f.cc new file mode 100644 index 0000000..fdc9423 --- /dev/null +++ b/src/bin/cf-884f.cc @@ -0,0 +1,675 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid cyclic dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +struct mcmf { + struct edge { + int to; + ll cap; + ll flow; + ll cost; + int rev; + int mark; + }; + vector> edges; + vector dis; + vector vis; + ll ret; + mcmf(int n) : edges(n + 1), dis(n + 1), vis(n + 1) {} + void add_edge(int from, int to, ll cap, ll cost, int mark = 0, int mark_rev = 0) { + edges[from].push_back({ to, cap, 0, cost, int(edges[to].size()), mark }); + edges[to].push_back({ from, 0, 0, -cost, int(edges[from].size() - 1), mark_rev }); + } + bool sp(int s, int t) { + dis.assign(edges.size(), INFLL); + dis[s] = 0; + int n = edges.size(); + int f = 1; + while (f) { + f = 0; + for (int i = 0; i < n; ++i) { + for (auto&& [to, cap, flow, cost, rev, mark] : edges[i]) { + if (cap > flow and dis[to] > dis[i] + cost) { + dis[to] = dis[i] + cost; + f = 1; + } + } + } + } + return dis[t] != INFLL; + } + ll dfs(int s, int t, ll cap) { + if (vis[s]) { + return 0; + } + vis[s] = 1; + if (s == t) { + return cap; + } + ll res = 0; + int n = edges[s].size(); + for (int i = 0; i < n; ++i) { + auto e = edges[s][i]; + if (e.cap > e.flow and dis[e.to] == dis[s] + e.cost) { + ll nw = dfs(e.to, t, min(cap - res, e.cap - e.flow)); + edges[s][i].flow += nw; + edges[e.to][e.rev].flow -= nw; + res += nw; + ret += nw * e.cost; + if (res == cap) { + return res; + } + } + } + return res; + } + // returns: (flow, cost) + pll run(int s, int t) { + ll res = 0; ret = 0; + while (sp(s, t)) { + vis.assign(edges.size(), 0); + ll curr = dfs(s, t, LLONG_MAX); + res += curr; + // BUG: this is a temporary fix of the infinite-looping issue observed + // when dealing with networks with negative weights. + if (curr == 0) break; + } + return { res, ret }; + } +}; + + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n); + vector a(n); + for (int i = 0; i < n; ++i) { + read(char, c); + a[i] = c - 'a'; + } + readvec(int, b, n); + mcmf net(4 * n * 26 + 3); + int filter1 = 1, filter2 = n / 2 * 26 + 1, split = n * 26 + 1, node = 2 * n * 26 + 1, base = 2 * n * 26 + n + 1; + int s = 4 * n * 26 - 1, t = 4 * n * 26 - 2; + for (int i = 0; i < n; ++i) { + net.add_edge(s, base + i, 1, 0); + for (int j = 0; j < n; ++j) { + net.add_edge(base + i, filter1 + (j >= n / 2 ? n - 1 - j : j) * 26 + a[i], 1, 0); + } + } + for (int i = 0; i < n / 2; ++i) { + for (int j = 0; j < 26; ++j) { + net.add_edge(filter1 + i * 26 + j, filter2 + i * 26 + j, 1, 0); + net.add_edge(filter2 + i * 26 + j, split + i * 26 + j, 1, a[i] == j ? -b[i] : 0); + net.add_edge(filter2 + i * 26 + j, split + (n - 1 - i) * 26 + j, 1, a[n - 1 - i] == j ? -b[n - 1 - i] : 0); + } + } + for (int i = 0; i < n; ++i) { + for (int j = 0; j < 26; ++j) { + net.add_edge(split + i * 26 + j, node + i, 1, 0); + } + net.add_edge(node + i, t, 1, 0); + } + auto [flow, cost] = net.run(s, t); + debug(flow); + cout << -cost << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cf-888f.cc b/src/bin/cf-888f.cc new file mode 100644 index 0000000..8fcebd2 --- /dev/null +++ b/src/bin/cf-888f.cc @@ -0,0 +1,609 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +// #pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid cyclic dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +// __attribute__((target("popcnt"))) +void solve() { + read(int, n); + vector a(n, vector(n)); + for (int i = 0; i < n; ++i) { + for (int j = 0; j < n; ++j) { + cin >> a[i][j]; + } + } + vector cache(n, vector(n, vector(2, -1))); + auto dfs = [&] (auto dfs, int l, int r, int left) -> ll { + if (l == r) return (left and a[l][l - 1]) + a[r][(r + 1) % n]; + else if (l > r) return 1; + if (cache[l][r][left] != -1) { + return cache[l][r][left]; + } + ll res = 0; + if (left) { + int u = (l - 1) % n; + for (int i = l; i <= r; ++i) { + if (a[u][i]) { + res = (res + dfs(dfs, l, i - 1, true) * dfs(dfs, i + 1, r, true) % MDL) % MDL; + // deb(l, r, u, i, res); + } + } + } + // connect to the right bound + { + int u = (r + 1) % n; + for (int i = l; i <= r; ++i) { + if (a[u][i]) { + res = (res + dfs(dfs, l, i - 1, false) * dfs(dfs, i + 1, r, true) % MDL) % MDL; + // deb(l, r, i, u, res); + } + } + } + return cache[l][r][left] = res; + }; + ll res = 0; + for (int i = 1; i < n; ++i) { + if (a[0][i]) { + res = (res + dfs(dfs, 1, i - 1, false) * dfs(dfs, i + 1, n - 1, true) % MDL) % MDL; + } + } + cout << res << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/cp-templates b/src/bin/cp-templates new file mode 160000 index 0000000..df3c66d --- /dev/null +++ b/src/bin/cp-templates @@ -0,0 +1 @@ +Subproject commit df3c66d5bffce87c763911d8e78987da8ef135de diff --git a/src/bin/lg-3804.cc b/src/bin/lg-3804.cc new file mode 100644 index 0000000..2ffa413 --- /dev/null +++ b/src/bin/lg-3804.cc @@ -0,0 +1,653 @@ +// #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +// #pragma GCC optimize("Ofast,unroll-loops") +/************* This code requires C++17. ***************/ + +#include +using namespace std; + +/* macro helpers */ +#define __NARGS(...) std::tuple_size::value +#define __DECOMPOSE_S(a, x) auto x = a; +#define __DECOMPOSE_N(a, ...) auto [__VA_ARGS__] = a; +constexpr void __() {} +#define __AS_PROCEDURE(...) __(); __VA_ARGS__; __() +#define __as_typeof(container) remove_reference::type +template struct argument_type; +template struct argument_type { using type = U; }; + +/* type aliases */ +#if LONG_LONG_MAX != INT64_MAX +using ll = int64_t; +using ull = uint64_t; +#else +using ll = long long; +using ull = unsigned long long; +#endif +using int128 = __int128_t; +using uint128 = __uint128_t; +using ld = long double; +using pii = pair; using pil = pair; using pid = pair; +using pli = pair; using pll = pair; using pld = pair; +using pdi = pair; using pdl = pair; using pdd = pair; +using tiii = tuple; using tiil = tuple; using tiid = tuple; +using tili = tuple; using till = tuple; using tild = tuple; +using tidi = tuple; using tidl = tuple; using tidd = tuple; +using tlii = tuple; using tlil = tuple; using tlid = tuple; +using tlli = tuple; using tlll = tuple; using tlld = tuple; +using tldi = tuple; using tldl = tuple; using tldd = tuple; +using tdii = tuple; using tdil = tuple; using tdid = tuple; +using tdli = tuple; using tdll = tuple; using tdld = tuple; +using tddi = tuple; using tddl = tuple; using tddd = tuple; +template using max_heap = priority_queue; +template using min_heap = priority_queue, greater<>>; +template using oi = ostream_iterator; +template using ii = istream_iterator; + +/* constants */ +constexpr int INF = 0x3f3f3f3f; +constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; +constexpr ll MDL = 1e9 + 7; +constexpr ll PRIME = 998'244'353; +constexpr ll MDL1 = 8784491; +constexpr ll MDL2 = PRIME; +constexpr int128 INT128_MAX = numeric_limits::max(); +constexpr uint128 UINT128_MAX = numeric_limits::max(); +constexpr int128 INT128_MIN = numeric_limits::min(); +constexpr uint128 UINT128_MIN = numeric_limits::min(); + +/* random */ + +mt19937_64 rd(chrono::duration_cast(chrono::system_clock::now().time_since_epoch()).count()); + +/* bit-wise operations */ +#define lowbit(x) ((x) & -(x)) +#define popcount(x) (__builtin_popcountll(ll(x))) +#define parity(x) (__builtin_parityll(ll(x))) +#define msp(x) (63LL - __builtin_clzll(ll(x))) +#define lsp(x) (__builtin_ctzll(ll(x))) + +/* arithmetic operations */ +#define mod(x, y) ((((x) % (y)) + (y)) % (y)) + +/* fast pairs */ +#define upair ull +#define umake(x, y) (ull(x) << 32 | (ull(y) & ((1ULL << 32) - 1))) +#define u1(p) ((p) >> 32) +#define u2(p) ((p) & ((1ULL << 32) - 1)) +#define ult std::less +#define ugt std::greater + +#define ipair ull +#define imake(x, y) (umake(x, y)) +#define i1(p) (int(u1(ll(p)))) +#define i2(p) (ll(u2(p) << 32) >> 32) +struct ilt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) < i2(b); + else return i1(a) < i1(b); + } +}; +struct igt { + bool operator()(const ipair& a, const ipair& b) const { + if (i1(a) == i1(b)) return i2(a) > i2(b); + else return i1(a) > i1(b); + } +}; + +/* conditions */ +#define loop while (1) +#define if_or(var, val) if (!(var == val)) var = val; else +#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) +#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) + +/* hash */ +struct safe_hash { + // https://codeforces.com/blog/entry/62393 + static uint64_t splitmix64(uint64_t x) { + // http://xorshift.di.unimi.it/splitmix64.c + x += 0x9e3779b97f4a7c15; + x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; + x = (x ^ (x >> 27)) * 0x94d049bb133111eb; + return x ^ (x >> 31); + } + + size_t operator()(uint64_t x) const { + static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); + return splitmix64(x + FIXED_RANDOM); + } +}; + +struct pair_hash { + template + size_t operator()(const pair& a) const { + auto hash1 = safe_hash()(a.first); + auto hash2 = safe_hash()(a.second); + if (hash1 != hash2) { + return hash1 ^ hash2; + } + return hash1; + } +}; + +uniform_int_distribution dist(PRIME); +const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); +struct array_hash { + template + size_t operator()(const Sequence& arr) const { + size_t pw1 = 1, pw2 = 1; + size_t res1 = 0, res2 = 0; + for (auto&& x : arr) { + res1 = (res1 + x * pw1) % __array_hash_mdl1; + res2 = (res2 + x * pw2) % __array_hash_mdl2; + pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; + pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; + } + return res1 + res2; + } +}; + +/* build data structures */ +#define faster(um) __AS_PROCEDURE((um).reserve(1024); (um).max_load_factor(0.25);) +#define unordered_counter(from, to) __AS_PROCEDURE(unordered_map<__as_typeof(from), size_t, safe_hash> to; for (auto&& x : from) ++to[x];) +#define counter(from, to, cmp) __AS_PROCEDURE(map<__as_typeof(from), size_t, cmp> to; for (auto&& x : from) ++to[x];) +#define adj(ch, n) __AS_PROCEDURE(vector> ch((n) + 1);) +#define edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v), ch[v].push_back(u);) +#define edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__), ch[v].emplace_back(u, __VA_ARGS__);) +#define Edge(ch, u, v) __AS_PROCEDURE(ch[u].push_back(v);) +#define Edgew(ch, u, v, ...) __AS_PROCEDURE(ch[u].emplace_back(v, __VA_ARGS__);) +template pair> discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} +template pair> unordered_discretize(Iterator __first, Iterator __last) { + set st(__first, __last); + size_t N = 0; + unordered_map mp; + for (auto&& x : st) mp[x] = ++N; + return {N, mp}; +} + +/* io */ +#define untie __AS_PROCEDURE(ios_base::sync_with_stdio(0), cin.tie(NULL)) + +// add declarations to avoid cyclic dependency +template istream& operator>>(istream&, pair&); +template ostream& operator<<(ostream&, const pair&); +template istream& operator>>(istream&, array&); +template ostream& operator<<(ostream&, const array&); +template +decltype(auto) operator<<(std::basic_ostream&, const std::tuple&); +template ostream& operator<<(ostream&, const vector&); +std::ostream& operator<<(std::ostream&, const int128&); + +template istream& operator>>(istream& in, pair& p) { + return in >> p.first >> p.second; +} +template ostream& operator<<(ostream& out, const pair& p) { + out << "{" << p.first << ", " << p.second << "}"; + return out; +} +template istream& operator>>(istream& in, array& a) { + for (size_t i = 0; i < N; ++i) in >> a[i]; + return in; +} +template ostream& operator<<(ostream& out, const array& a) { + for (auto&& i : a) out << i << ' '; + return out; +} +template +void print_tuple_impl(std::basic_ostream& os, const Tuple& t, std::index_sequence) { + using swallow = int[]; // guaranties left to right order + (void)swallow { 0, (void(os << (Index == 0 ? "" : ", ") << std::get(t)), 0)... }; +} +template +decltype(auto) operator<<(std::basic_ostream& os, const std::tuple& t) { + os << "{"; + print_tuple_impl(os, t, std::index_sequence_for{}); + return os << "}"; +} +template ostream& operator<<(ostream& out, const vector& vec) { + for (auto&& i : vec) out << i << ' '; + return out; +} +std::ostream& operator<<(std::ostream& dest, const int128& value) { + // https://stackoverflow.com/a/25115163/23881100 + std::ostream::sentry s( dest ); + if ( s ) { + uint128 tmp = value < 0 ? -value : value; + char buffer[ 128 ]; + char* d = std::end( buffer ); + do { + -- d; + *d = "0123456789"[ tmp % 10 ]; + tmp /= 10; + } while ( tmp != 0 ); + if ( value < 0 ) { + -- d; + *d = '-'; + } + int len = std::end( buffer ) - d; + if ( dest.rdbuf()->sputn( d, len ) != len ) { + dest.setstate( std::ios_base::badbit ); + } + } + return dest; +} +template void __read(T& x) { cin >> x; } +template void __read(T& x, U&... args) { cin >> x; __read(args...); } +#define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define deb(...) debug(make_tuple(__VA_ARGS__)) + +/* pops */ +template +inline auto poptop(Container& q) { + auto ret = q.top(); + q.pop(); + return ret; +} +template +inline auto popback(Container& q) { + auto ret = q.back(); + q.pop_back(); + return ret; +} +template +inline auto popfront(Container& q) { + auto ret = q.front(); + q.pop_front(); + return ret; +} + +/* math */ +template +return_t qpow(ll b, ll p) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + return_t half = qpow(b, p / 2); + if (p % 2 == 1) return half * half * b; + else return half * half; +} + +// dynamic modulus +ll qpow(ll b, ll p, ll mod) { + if (b == 0 and p != 0) return 0; + if (p == 0) return 1; + ll half = qpow(b, p / 2, mod); + if (p % 2 == 1) return (int128(half) * half % mod) * b % mod; + else return half * half % mod; +} + + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wparentheses" +// Accurately find `i` 'th root of `n` (taking the floor) +inline ll root(ll n, ll i) { + ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + while (l < r) { + ll mid = l + r + 1 >> 1; + if (qpow(mid, i) <= n) { + l = mid; + } else { + r = mid - 1; + } + } + return l; +} +#pragma GCC diagnostic pop + + +#define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)]) +#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)]) + +__attribute__((target("lzcnt"))) +constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); } + +template +T mygcd(T a, T b) { return b == 0 ? a : mygcd(b, a % b); } + +void __exgcd(ll a, ll b, ll& x, ll& y) { + if (b == 0) { + x = 1, y = 0; + return; + } + __exgcd(b, a % b, y, x); + y -= a / b * x; +} + +ll inverse(ll a, ll b) { + ll x, y; + __exgcd(a, b, x, y); + return mod(x, b); +} + +vector> decompose(ll x) { + // return (factor, count, factor ** count) + vector> res; + for (int i = 2; i * i <= x; i++) { + if (x % i == 0) { + int cnt = 0; + ll pw = 1; + while (x % i == 0) ++cnt, x /= i, pw *= i; + res.emplace_back(i, cnt, pw); + } + } + if (x != 1) { + res.emplace_back(x, 1, x); + } + return res; +} + +vector decompose_prime(int N) { + // return (factor, count) + vector result; + for (int i = 2; i * i <= N; i++) { + if (N % i == 0) { + int cnt = 0; + while (N % i == 0) N /= i, ++cnt; + result.emplace_back(i, cnt); + } + } + if (N != 1) { + result.emplace_back(N, 1); + } + return result; +} + +/* string algorithms */ +vector calc_next(string t) { // pi function of t + int n = (int)t.length(); + vector pi(n); + for (int i = 1; i < n; i++) { + int j = pi[i - 1]; + while (j > 0 && t[i] != t[j]) j = pi[j - 1]; + if (t[i] == t[j]) j++; + pi[i] = j; + } + return pi; +} +vector calc_z(string t) { // z function of t + int m = t.length(); + vector z; + z.push_back(m); + pair prev = {1, -1}; + for (int i = 1; i < m; ++i) { + if (z[i - prev.first] + i <= prev.second) { + z.push_back(z[i - prev.first]); + } else { + int j = max(i, prev.second + 1); + while (j < m && t[j] == t[j - i]) ++j; + z.push_back(j - i); + prev = {i, j - 1}; + } + } + return z; +} +vector kmp(string s, string t) { // find all t in s + string cur = t + '#' + s; + int sz1 = s.size(), sz2 = t.size(); + vector v; + vector lps = calc_next(cur); + for (int i = sz2 + 1; i <= sz1 + sz2; i++) { + if (lps[i] == sz2) v.push_back(i - 2 * sz2); + } + return v; +} +int period(string s) { // find the length of shortest recurring period + int n = s.length(); + auto z = calc_z(s); + for (int i = 1; i <= n / 2; ++i) { + if (n % i == 0 && z[i] == n - i) { + return i; + } + } + return n; +} + +/* modular arithmetic */ +template struct MLL { + ll val; + MLL(ll v = 0) : val(mod(v, mdl)) {} + MLL(const MLL& other) : val(other.val) {} + friend MLL operator+(const MLL& lhs, const MLL& rhs) { return mod(lhs.val + rhs.val, mdl); } + friend MLL operator-(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - rhs.val, mdl); } + friend MLL operator*(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * rhs.val, mdl); } + friend MLL operator/(const MLL& lhs, const MLL& rhs) { return mod(lhs.val * mod(inverse(rhs.val, mdl), mdl), mdl); } + friend MLL operator%(const MLL& lhs, const MLL& rhs) { return mod(lhs.val - (lhs / rhs).val, mdl); } + friend bool operator==(const MLL& lhs, const MLL& rhs) { return lhs.val == rhs.val; } + friend bool operator!=(const MLL& lhs, const MLL& rhs) { return lhs.val != rhs.val; } + MLL& operator+=(const MLL& rhs) { return *this = *this + rhs; } + MLL& operator-=(const MLL& rhs) { return *this = *this - rhs; } + MLL& operator*=(const MLL& rhs) { return *this = *this * rhs; } + MLL& operator/=(const MLL& rhs) { return *this = *this / rhs; } + MLL& operator%=(const MLL& rhs) { return *this = *this % rhs; } +}; + +template +ostream& operator<<(ostream& out, const MLL& num) { + return out << num.val; +} + +template +istream& operator>>(istream& in, MLL& num) { + return in >> num.val; +} + +// miscancellous +template +bool chmax(T& lhs, const U& rhs) { + bool ret = lhs < rhs; + if (ret) { + lhs = rhs; + } + return ret; +} +template +bool chmin(T& lhs, const U& rhs) { + bool ret = lhs > rhs; + if (ret) { + lhs = rhs; + } + return ret; +} + +#define functor(func) ([&](auto&&... val) \ +noexcept(noexcept(func(std::forward(val)...))) -> decltype(auto) \ +{return func(std::forward(val)...);}) +#define expr(ret, ...) ([&] (__VA_ARGS__) { return (ret); }) +template void sort_by_key(RandomIt first, RandomIt last, Func extractor) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); }); +} +template void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) { + std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); }); +} +template +vector> zip(Iterator_T a_first, Iterator_T a_last, Iterator_U b_first, Iterator_U b_last) { + vector> res; + auto a_it = a_first; + auto b_it = b_first; + for (; not (a_it == a_last) and not (b_it == b_last); ++a_it, ++b_it) { + res.emplace_back(*a_it, *b_it); + } + return res; +} +template +vector> zip_n(Iterator_T a_first, Iterator_U b_first, size_t n) { + vector> res; + if (n > 0) { + res.emplace_back(*a_first, *b_first); + for (size_t i = 1; i != n; ++i) { + res.emplace_back(*++a_first, *++b_first); + } + } + return res; +} +template +class ArithmeticIterator : bidirectional_iterator_tag { +public: + using difference_type = ptrdiff_t; + using value_type = T; +private: + value_type value; +public: + ArithmeticIterator(const T& value) : value(value) {} + value_type operator*() const { return value; } + ArithmeticIterator& operator++() { ++value; return *this; } + ArithmeticIterator& operator--() { --value; return *this; } + bool operator==(const ArithmeticIterator& rhs) const { return value == rhs.value; } +}; +template vector> enumerate(const vector& container) { + return zip(ArithmeticIterator(0), ArithmeticIterator(INT_MAX), container.begin(), container.end()); +} +#define initarray(init, N) (__initarray::type, (N)>(init)) +namespace detail { + template + constexpr std::array + make_array(const T& value, std::index_sequence) { + return {{(static_cast(Is), value)...}}; + } +} + +template +constexpr std::array __initarray(const T& value) { + return detail::make_array(value, std::make_index_sequence()); +} +/*******************************************************/ + +#define SINGLE_TEST_CASE +// #define DUMP_TEST_CASE 7219 +// #define TOT_TEST_CASE 10000 + +void dump() {} + +void dump_ignore() {} + +void prep() { +} + +template +struct SAM { + vector fa, len; + vector cloned; + vector cnt; + vector> ch; + int last; + int tot; + + int create(int _fa, int _len, bool _cloned, array&& _ch) { + fa.emplace_back(_fa); + len.emplace_back(_len); + cloned.emplace_back(_cloned); + ch.emplace_back(_ch); + return tot++; + } + + SAM(void) : fa(2), len(2), cloned(2), ch(2), last(1), tot(2) {} + + void push_back(size_t c) { + int p = last; + int nw = create(0, len[p] + 1, false, {}); + + while (p != 0 and ch[p][c] == 0) { + ch[p][c] = nw; + p = fa[p]; + } + + if (p == 0) { + fa[nw] = 1; + } else { + int q = ch[p][c]; + if (len[q] == len[p] + 1) { + fa[nw] = q; + } else { + int nq = create(fa[q], len[p] + 1, true, array(ch[q])); + fa[nw] = fa[q] = nq; + while (p != 0 and ch[p][c] == q) { + ch[p][c] = nq; + p = fa[p]; + } + } + } + + last = nw; + } + + template + optional find(const basic_string& seq) { + int p = 1; + for (auto&& c : seq) { + if (ch[p][c] == 0) { + return nullopt; + } + p = ch[p][c]; + } + return p; + } + + // Fill `cnt` with the number of occurrences of each substring. + void populate(void) { + cnt.assign(tot, 0); + vector idx(tot); + iota(idx.begin(), idx.end(), 0); + sort_by_key(idx.begin(), idx.end(), expr(len[i], auto&& i), greater()); + for (auto&& v : idx) { + if (v > 1 and not cloned[v]) { + cnt[v] += 1; + } + cnt[fa[v]] += cnt[v]; + } + } +}; + +// __attribute__((target("popcnt"))) +void solve() { + read(string, s); + SAM<26> sam; + for (auto&& c : s) { + sam.push_back(c - 'a'); + } + sam.populate(); + ll res = 0; + for (int i = 0; i < sam.tot; ++i) { + if (sam.cnt[i] != 1) { + chmax(res, ll(1) * sam.cnt[i] * sam.len[i]); + } + } + cout << res << '\n'; +} + +int main() { +#if __cplusplus < 201402L or defined(_MSC_VER) and not defined(__clang__) + static_assert(false, "incompatible compiler variant detected."); +#endif + untie; + prep(); +#ifdef SINGLE_TEST_CASE + solve(); +#else + read(int, t); + for (int i = 0; i < t; ++i) { +#ifdef DUMP_TEST_CASE + if (t != (TOT_TEST_CASE)) { + solve(); + } else if (i + 1 == (DUMP_TEST_CASE)) { + dump(); + } else { + dump_ignore(); + } +#else + solve(); +#endif + } +#endif +} diff --git a/src/bin/std.in b/src/bin/std.in index 8193abe..39dcb54 100644 --- a/src/bin/std.in +++ b/src/bin/std.in @@ -1,2 +1,3 @@ -4 -1 2 3 4 +3 1000000000000000000 + +5 4 5 diff --git a/src/bin/template.cc b/src/bin/template.cc index e98d7c7..b5a9fe4 100644 --- a/src/bin/template.cc +++ b/src/bin/template.cc @@ -25,7 +25,7 @@ using ull = unsigned long long; #endif using int128 = __int128_t; using uint128 = __uint128_t; -using ld = long double; +using ld = __float128; using pii = pair; using pil = pair; using pid = pair; using pli = pair; using pll = pair; using pld = pair; using pdi = pair; using pdl = pair; using pdd = pair; @@ -48,6 +48,7 @@ constexpr int INF = 0x3f3f3f3f; constexpr ll INFLL = 0x3f3f3f3f3f3f3f3fLL; constexpr ll MDL = 1e9 + 7; constexpr ll PRIME = 998'244'353; +constexpr ll PRIMELL = 901017227882342239LL; constexpr ll MDL1 = 8784491; constexpr ll MDL2 = PRIME; constexpr int128 INT128_MAX = numeric_limits::max(); @@ -96,9 +97,9 @@ struct igt { /* conditions */ #define loop while (1) -#define if_or(var, val) if (!(var == val)) var = val; else -#define continue_or(var, val) __AS_PROCEDURE(if (var == val) continue; var = val;) -#define break_or(var, val) __AS_PROCEDURE(if (var == val) break; var = val;) +#define if_or(var, val) if (!((var) == (val))) (var) = (val); else +#define continue_or(var, val) __AS_PROCEDURE(if ((var) == (val)) continue; (var) = (val);) +#define break_or(var, val) __AS_PROCEDURE(if ((var) == (val)) break; (var) = (val);) /* hash */ struct safe_hash { @@ -132,13 +133,15 @@ struct pair_hash { uniform_int_distribution dist(PRIME); const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); struct array_hash { + safe_hash hasher; template size_t operator()(const Sequence& arr) const { size_t pw1 = 1, pw2 = 1; size_t res1 = 0, res2 = 0; for (auto&& x : arr) { - res1 = (res1 + x * pw1) % __array_hash_mdl1; - res2 = (res2 + x * pw2) % __array_hash_mdl2; + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; } @@ -173,7 +176,7 @@ template pair istream& operator>>(istream&, pair&); template ostream& operator<<(ostream&, const pair&); template istream& operator>>(istream&, array&); @@ -239,14 +242,14 @@ std::ostream& operator<<(std::ostream& dest, const int128& value) { template void __read(T& x) { cin >> x; } template void __read(T& x, U&... args) { cin >> x; __read(args...); } #define read(t, ...) __AS_PROCEDURE(argument_type::type __VA_ARGS__; __read(__VA_ARGS__);) -#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : a) cin >> x;) -#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), a.begin() + 1);) -#define putvec(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) -#define putvec1(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) -#define putvec_eol(a) __AS_PROCEDURE(copy(a.begin(), a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) -#define putvec1_eol(a) __AS_PROCEDURE(copy(a.begin() + 1, a.end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define readvec(t, a, n) __AS_PROCEDURE(vector::type> a(n); for (auto& x : (a)) cin >> x;) +#define readvec1(t, a, n) __AS_PROCEDURE(vector::type> a((n) + 1); copy_n(ii::type>(cin), (n), (a).begin() + 1);) +#define putvec(a) __AS_PROCEDURE(copy((a).begin(), (a).end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec1(a) __AS_PROCEDURE(copy((a).begin() + 1, (a).end(), oi<__as_typeof(a)::value_type>(cout, " ")); cout << endl;) +#define putvec_eol(a) __AS_PROCEDURE(copy((a).begin(), (a).end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) +#define putvec1_eol(a) __AS_PROCEDURE(copy((a).begin() + 1, (a).end(), oi<__as_typeof(a)::value_type>(cout, "\n"));) #define debug(x) __AS_PROCEDURE(cerr << #x" = " << (x) << endl;) -#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : a) cerr << x << ' '; cerr << endl;) +#define debugvec(a) __AS_PROCEDURE(cerr << #a" = "; for (auto&& x : (a)) cerr << x << ' '; cerr << endl;) #define deb(...) debug(make_tuple(__VA_ARGS__)) /* pops */ @@ -293,7 +296,7 @@ ll qpow(ll b, ll p, ll mod) { #pragma GCC diagnostic ignored "-Wparentheses" // Accurately find `i` 'th root of `n` (taking the floor) inline ll root(ll n, ll i) { - ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + ll l = 0, r = pow(LLONG_MAX, (long double)(1) / i); while (l < r) { ll mid = l + r + 1 >> 1; if (qpow(mid, i) <= n) { @@ -393,7 +396,7 @@ vector calc_z(string t) { // z function of t } return z; } -vector kmp(string s, string t) { // find all t in s +vector kmp(const string& s, const string& t) { // find all t in s string cur = t + '#' + s; int sz1 = s.size(), sz2 = t.size(); vector v; @@ -403,7 +406,7 @@ vector kmp(string s, string t) { // find all t in s } return v; } -int period(string s) { // find the length of shortest recurring period +int period(const string& s) { // find the length of shortest recurring period int n = s.length(); auto z = calc_z(s); for (int i = 1; i <= n / 2; ++i) { diff --git a/src/bin/test.cc b/src/bin/test.cc index e98d7c7..4a9e7b4 100644 --- a/src/bin/test.cc +++ b/src/bin/test.cc @@ -1,4 +1,5 @@ // #pragma GCC target("popcnt,lzcnt,abm,bmi,bmi2") +#include #pragma GCC optimize("Ofast,unroll-loops") /************* This code requires C++17. ***************/ @@ -25,7 +26,7 @@ using ull = unsigned long long; #endif using int128 = __int128_t; using uint128 = __uint128_t; -using ld = long double; +using ld = __float128; using pii = pair; using pil = pair; using pid = pair; using pli = pair; using pll = pair; using pld = pair; using pdi = pair; using pdl = pair; using pdd = pair; @@ -132,13 +133,15 @@ struct pair_hash { uniform_int_distribution dist(PRIME); const size_t __array_hash_b = 31, __array_hash_mdl1 = dist(rd), __array_hash_mdl2 = dist(rd); struct array_hash { + safe_hash hasher; template size_t operator()(const Sequence& arr) const { size_t pw1 = 1, pw2 = 1; size_t res1 = 0, res2 = 0; for (auto&& x : arr) { - res1 = (res1 + x * pw1) % __array_hash_mdl1; - res2 = (res2 + x * pw2) % __array_hash_mdl2; + auto h = hasher(x); + res1 = (res1 + h * pw1) % __array_hash_mdl1; + res2 = (res2 + h * pw2) % __array_hash_mdl2; pw1 = (pw1 * __array_hash_b) % __array_hash_mdl1; pw2 = (pw2 * __array_hash_b) % __array_hash_mdl2; } @@ -173,7 +176,7 @@ template pair istream& operator>>(istream&, pair&); template ostream& operator<<(ostream&, const pair&); template istream& operator>>(istream&, array&); @@ -293,7 +296,7 @@ ll qpow(ll b, ll p, ll mod) { #pragma GCC diagnostic ignored "-Wparentheses" // Accurately find `i` 'th root of `n` (taking the floor) inline ll root(ll n, ll i) { - ll l = 0, r = pow(LLONG_MAX, ld(1) / i); + ll l = 0, r = pow(LLONG_MAX, (long double)(1) / i); while (l < r) { ll mid = l + r + 1 >> 1; if (qpow(mid, i) <= n) { @@ -524,7 +527,7 @@ constexpr std::array __initarray(const T& value) { } /*******************************************************/ -// #define SINGLE_TEST_CASE +#define SINGLE_TEST_CASE // #define DUMP_TEST_CASE 7219 // #define TOT_TEST_CASE 10000 @@ -537,6 +540,12 @@ void prep() { // __attribute__((target("popcnt"))) void solve() { + for (int i = 9; ; i += 9) { + if (parity(i)) { + debug(i); + return; + } + } } int main() { diff --git a/src/bin/test.py b/src/bin/test.py index 9896946..569cebe 100644 --- a/src/bin/test.py +++ b/src/bin/test.py @@ -8,7 +8,7 @@ import io PRIME = 998_244_353 if __name__ == '__main__': - N = 10 ** 6 - print(N, N) - print(*(f'{randint(1, N)} {randint(1, N)} {randint(0, 10 ** 8)}' for _ in range(N))) - print(randint(1, N)) + N = 2 * (10 ** 5) + print(N) + for i in range(N): + print(i + 1, randint(1, 10 ** 9)) \ No newline at end of file