Cod sursa(job #515677)

Utilizator vlasceanuVlasceanu Razvan vlasceanu Data 22 decembrie 2010 03:59:07
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.5 kb
#include <fstream>
#include <iostream>
#define in "lgput.in"
#define out "lgput.out"
typedef long long ul;

using namespace std;

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

int main()
{
    ofstream fout(out);
    ifstream fin(in);
    ul n,p;
    fin>>n>>p;
    fout<<NlaP(n,p);
    fin.close();
    fout.close();
    return 0;
}