6주차_1009.c

#include <stdio.h>

int main()
{
    int testcase;
    scanf("%d", &testcase);
    for (int i = 0; i < testcase; i++)
    {
        int a, b;
        scanf("%d %d", &a, &b);
        int task = a;
        for (int j = 1; j < b; j++)
        {
            task = task * a %10;
        }
        if (task % 10== 0)
            printf("%d\n", 10);
        else
            printf("%d\n", task % 10);
    }
}