Cod sursa(job #1183094)

Utilizator denisx304Visan Denis denisx304 Data 8 mai 2014 15:11:49
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.49 kb
#include <fstream>
#include <iostream>
using namespace std;
int n, p;

long long exp(long long x, long long n)
{
    if (n == 0)
        return 1;
    if (n == 1)
        return x;
    if (n % 2 == 0)
        return exp(x * x, n / 2) % 1999999973;
    if (n % 2 != 0)
        return (x * (exp(x * x, (n - 1) / 2) % 1999999973)) % 1999999973;
}

int main()
{
    ifstream cin("lgput.in");
    ofstream cout("lgput.out");
    cin >> n >> p;
    cout << exp(n, p);
    return 0;
}