Cod sursa(job #1852829)

Utilizator Storm_FireFox1Matei Gardus Storm_FireFox1 Data 21 ianuarie 2017 10:55:17
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.5 kb
#include <iostream>
#include <fstream>

using namespace std;

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

int pow(long long x, long long p)
{
    long long rez, r;
    rez = 1;
    r = 1999999973;
    while(p)
    {
        if(p % 2 == 1)
        {
            rez = rez * x;
            rez %= r;
        }
        x = x * x;
        x%=r;
        p/=2;
    }
    return rez;
}

int main()
{
    long long x, p;
    fin >> x >> p;
    fout << pow(x, p);
    return 0;
}