Cod sursa(job #2057783)

Utilizator MrRobotMrRobot MrRobot Data 4 noiembrie 2017 19:14:01
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.41 kb
#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("lgput.in");
ofstream fout("lgput.out");

int exp_log (int n, int p)
{
    if (p == 0)
        return 1;
    if (p == 1)
        return n;
    if (p%2 == 0)
        return (exp_log(n*n, p/2));
    if (p%2 == 1)
        return (n*exp_log(n*n, (p-1)/2));
}

int main()
{
    int N, P;
    fin>>N>>P;
    fout<<exp_log(N, P);
}