Cod sursa(job #2118347)

Utilizator IustinSSurubaru Iustin IustinS Data 30 ianuarie 2018 15:56:16
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.38 kb
#include <fstream>

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

int a, b;

long long exp(long long x, long long y);
int main()
{
   fin>>a>>b;
   fout<<exp(a, b);
    return 0;
}
long long exp(long long x, long long y)
{
    if (y<=1)
        return x;
    else if (y%2==0)
        return exp(x*x, y/2);
    else return x*exp(x*x, y/2);
}