Cod sursa(job #2689763)
| Utilizator | Data | 22 decembrie 2020 02:00:50 | |
|---|---|---|---|
| Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
| Compilator | cpp-64 | Status | done |
| Runda | Arhiva educationala | Marime | 0.44 kb |
#include <bits/stdc++.h>
#define ll long long
using namespace std;
ll powlg(ll x, ll b, ll mod) {
if(b < 0) return powlg(1 / x, -b, mod);
if(b == 0) return 1;
if(b == 1) return x;
if(b%2 == 0) return powlg(x * x, b/2, mod) % mod;
if(b%2 == 1) return (x * powlg(x * x, (b-1)/2, mod)) % mod;
return 0;
}
ifstream fin("lgput.in");
ofstream fout("lgput.out");
int main(){
ll x,y;
fin>>x>>y;
fout<<powlg(x, y, 1999999973);
}
