Cod sursa(job #1732596)

Utilizator qxZapMilea Mihai qxZap Data 21 iulie 2016 23:54:15
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.44 kb
#include <iostream>
#include <fstream>

using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");
int xlan(int x,int n)
{
    if(x<0)
        return xlan(1/x,-n);
    else if(n==1)
        return x;
    else if(n==0)
        return 1;
    else if(n%2==0)
        return xlan(x*x,n/2);
    else if(n%2)
        return x*xlan(x*x,(n-1)/2);



}


int main()
{
    int a,b;
    f>>a>>b;
    g<<xlan(a,b);
}