Cod sursa(job #1984571)

Utilizator Dragne.Andrei11Dragne Andrei Dragne.Andrei11 Data 25 mai 2017 11:03:50
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.5 kb
#include <bits/stdc++.h>
#define MOD 1999999973

using namespace std;

int multy(int& a, int b)
{
    a=(a*b)%MOD;
}

int exp_by_squaring(int a, int b)
{
    int ans = 1;
    while (b > 0)
    {
        if (b&1)
            multy(ans, a);
        b>>=1;
        multy(a, a);
    }
    return ans;
}

int main()
{
    freopen("lgput.in", "r", stdin);
    freopen("lgput.out", "w", stdout);
    int n, p;
    cin>>n>>p;
    cout<<exp_by_squaring(n, p)<<'\n';

    return 0;
}