Cod sursa(job #1382140)
| Utilizator | Data | 8 martie 2015 15:24:30 | |
|---|---|---|---|
| Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 0.51 kb |
#include <iostream>
using namespace std;
#define mod 1999999973
int exp_by_squaring(int x, int n) {
if (n < 0) return exp_by_squaring(1 / x, -n);
else if (n == 0) return 1;
else if (n == 1) return x;
else if (n % 2 == 0) return exp_by_squaring(x * x, n / 2);
else return x * exp_by_squaring(x * x, (n - 1) / 2);
}
int main()
{
int n, p;
freopen("lgput.in", "r", stdin);
freopen("lgput.out", "w", stdout);
cin >> n >> p;
cout << exp_by_squaring(n, p) % mod;
return 0;
}
