HDU 2035 ( 人见人爱A^B )

Problem : 2035 ( 人见人爱A^B )     Judge Status : Accepted
RunId : 5683762    Language : C++    Author : ssun
Code Render Status : Rendered By HDOJ C++ Code Render Version 0.01 Beta

#include<iostream>
using namespace std;

int pow_mod(int a,int b)
{
    if(b==1) return a;
    __int64 x = pow_mod(a,b/2);
    __int64 ans = x * x % 1000;
    if(b%2==1) ans = ans * a % 1000;
    return (int)ans;
}

int main()
{
    int a,b,i;
    while(scanf("%d%d",&a,&b)!=EOF)
    {
        if(a==0 && b==0) break;
        printf("%d\n",pow_mod(a,b));
    }
    return 0;
}