Cod sursa(job #1462569)

Utilizator dex4Darjan Catalin dex4 Data 18 iulie 2015 15:57:57
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.45 kb
#include <iostream>
#include <fstream>

using namespace std;

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

int x, n;

int main()
{
    ifstream f("lgput.in");
    ofstream g("lgput.out");

    f >> x >> n;
    g << lg_pow(x, n);
    return 0;
}