杭电ACM1061N^N求最右边的数的问题

#include<iostream>using namespace std;int main(){    int n;    cin>>n;    while (n--)    {        int m;        cin>>m;        int a[10][5]={        {0,0,0,0,0},{1,1,1,1,1},{6,2,4,8,6},{1,3,9,7,1},{6,4,6,4,6},{5,5,5,5,5},{6,6,6,6,6},{1,7,9,3,1},{6,8,4,2,6},{1,9,1,9,1}};        cout<<a[m%10][m%4]<<endl;    }    return 0;}