Cod sursa(job #1449211)

Utilizator Diana07Diana Elena Diana07 Data 8 iunie 2015 23:03:36
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.43 kb
#include <fstream>
using namespace std;

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

int main()
{
    long long a;
    int b;
    f>>a>>b;
    g<<p(a,b);
    return 0;
}