Cod sursa(job #1505566)

Utilizator ilinoiuflaviusIlinoiu Flavius ilinoiuflavius Data 19 octombrie 2015 13:43:50
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.39 kb
#include <iostream>
#include <fstream>
using namespace std;

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

long long n,p;
int R(float x,int p)
{
    if(p<0)return R(1/x,-p);
    if(p==0)return 1;
    if(p==1)return x;
    if(p%2==0)
        return R(x*x,p/2);
    if(p%2==1)
        return x * R(x*x,(p-1)/2);
}
int main()
{
    f>>n>>p;
    g<<R(n,p);
    return 0;
}