Cod sursa(job #1200405)

Utilizator moise_alexandruMoise Alexandru moise_alexandru Data 22 iunie 2014 14:12:38
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.46 kb
#include <iostream>
#include <fstream>

using namespace std;
ifstream in("lgput.in");
ofstream out("lgput.out");

const int mod = 1999999973;
int f(int a,int b)
{
    if(b==0)
        return 1;
    else
    {
        if(b%2==0)
            return (f(a,b/2)%mod)*(f(a,b/2)%mod) % mod ;
        else
            return (f(a,b/2)%mod)*(a%mod)*(f(a,b/2)%mod) % mod;
    }
}

int main()
{
    int a,b;
    in>>a>>b;
    out<<f(a,b);

    return 0;
}