Cod sursa(job #1944335)

Utilizator nerelog25Radu Andrei Stefan nerelog25 Data 29 martie 2017 08:51:37
Problema Ridicare la putere in timp logaritmic Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.43 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");
long long x;
int n;
long long P(long long x,int n)
{
    double a;
    if(n==0) return 1;
    if(n==1) return x;
          else
          {
              a=P(x,n/2);
              if(n%2==1) return a*a*x;
              else return a*a;
          }
}
int main()
{
f>>x>>n;
f<< P(x,n)<< endl;
    return 0;
}