Cod sursa(job #1507962)

Utilizator Cozzmy13Tanislav Cosmin Cozzmy13 Data 22 octombrie 2015 08:52:56
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.47 kb
#include <bits/stdc++.h>

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

long long int power(int x, int n)
{
    if(n < 0)
        return power(1 / x, -n);
    else if (n == 0)
        return 1;
    else if (n == 1)
        return x;
    else if (n % 2 == 0)
        return power(x * x, n / 2);
    else if (n % 2 == 1)
        return x * power(x * x, (n - 1) / 2);
}

int main()
{
    int n, k;
    in >> n >> k;
    out << power(n, k);
    return 0;
}