Cod sursa(job #1144698)

Utilizator ciubakkaCiobotarasu Vlad ciubakka Data 17 martie 2014 14:37:48
Problema Ridicare la putere in timp logaritmic Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.43 kb
#include <iostream>
#include <fstream>
#define nr 1999999973
using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");

long long putere(long long x, long long y)
{
    int i;
    long long a=1,b=x;
    for(i=0;(1<<i)<=y;++i)
    {
        if((1<<i)&y > 0)
            a=(a*b)%nr;
        b=(b*b)%nr;
    }
    return a;
}
int main()
{
    long long n,p;
    f>>n>>p;
    g<<putere(n,p)%nr;
    return 0;
}