题目:http://acm.hdu.edu.cn/showproblem.php?pid=1061
#include<stdio.h>
int main()
{
int n, m, unit;
int a[10][4]={{0,0,0,0},{1,1,1,1},{6,2,4,8},{1,3,9,7},{6,4,6,4},{5,5,5,5},{6,6,6,6},{1,7,9,3},{6,8,4,2},{1,9,1,9} };
scanf("%d", &m);
while( m-- )
{
scanf("%d", &n);
unit=n;
printf("%d\n", a[unit][n%4]);
}
}