Cod sursa(job #1152039)

Utilizator ionut98Bejenariu Ionut Daniel ionut98 Data 24 martie 2014 15:19:07
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.5 kb
#include <fstream>
#define MOD 1999999973
using namespace std;

ifstream fin("lgput.in");
ofstream fout("lgput.out");

int n, p;
long long exp(int x, int y)
{

    if (!y) return 1;
    else
    if (y % 2) return (x % MOD)*(exp(x, y-1) % MOD) % MOD;
    else
    {
        long long p2;
        p2 = exp(x, y/2) % MOD;
        return (p2 % MOD) * (p2 % MOD) % MOD;
    }
}
int main()
{
    fin>>n>>p;
    fout<<exp(n, p)<<'\n';
    fin.close();
    fout.close();
    return 0;
}