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add: lpow

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arielherself 2025-01-04 17:56:19 +08:00
parent d4d2d86f43
commit 6ce8d08534
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number/examples/lpow.cc Normal file
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constexpr int B = 2;
constexpr int N = 1e5;
constexpr int s = 31623; // sqrt(MDL)
int a[N], b[N];
void prep() {
a[0] = b[0] = 1;
for(int i = 1; i <= s; i++) a[i] = (ll)a[i - 1] * B % MDL ;
for(int i = 1; i <= s; i++) b[i] = (ll)b[i - 1] * a[s] % MDL ;
}
ll lpow(ll power) { return ll(b[power / s]) * a[power % s] % MDL; }