HDU 1061: Rightmost Digit

///@date 9/26/2017
///@author Sycamore
///@link http://acm.hdu.edu.cn/showproblem.php?pid=1061
#include<bits/stdc++.h>
using namespace std;
long long powermod(long long a, long long b, long long  m)
{
    long long ret = 1;
 while (b)
    {
        if (b & 1) ret = (ret*a)%m;
 a = (a*a)%m;   b >>= 1;
 }
    return ret;
}

int main()
{

   ios::sync_with_stdio(false);
 cin.tie(nullptr);
 int T;
 cin>>T;
 while(T--)
    {
        long long n;
 cin>>n;
 cout<<powermod(n,n,10)<<‘\n‘;
 }

}

HDU 1061: Rightmost Digit

原文：http://www.cnblogs.com/zjnu/p/7598919.html