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Update include.hh

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Ariel 2024-02-10 22:57:51 +08:00 committed by GitHub
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1 changed files with 16 additions and 1 deletions
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include.hh
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@ -133,8 +133,23 @@ template<typename T> ostream& operator<<(ostream& out, vector<T> vec) {
#define popback(q, ...) __AS_PROCEDURE(auto [__VA_ARGS__] = q.back(); q.pop_back();) #define popback(q, ...) __AS_PROCEDURE(auto [__VA_ARGS__] = q.back(); q.pop_back();)
#define popfront(q, ...) __AS_PROCEDURE(auto [__VA_ARGS__] = q.front();q.pop_front();) #define popfront(q, ...) __AS_PROCEDURE(auto [__VA_ARGS__] = q.front();q.pop_front();)
/* algorithms */ /* math */
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);
}
/* string algorithms */
vector<int> calc_next(string t) { // pi function of t vector<int> calc_next(string t) { // pi function of t
int n = (int)t.length(); int n = (int)t.length();
vector<int> pi(n); vector<int> pi(n);