Cod sursa(job #1129373)

Utilizator acelasiStanciu Rares acelasi Data 27 februarie 2014 21:44:45
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;

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

int main()
{
    ifstream f("lgput.in");
    int a, b;
    f >> a >> b;
    f.close();

    ofstream g("lgput.out");
    g << Putere(a, b);
    g.close();
    return 0;
}