Rightmost Digit

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 45421    Accepted Submission(s): 17090

#include <bits/stdc++.h>
using namespace std;
long long power_mod(long long a, long long b, long long c)
{
long long ans = 1;
a = a % c;
while(b>0)
{
if(b&1)
ans = (ans * a) % c;
b = b>>1;
a = (a * a) % c;
}
return ans;
}
int main()
{
	int T;
	scanf("%d",&T);
    while(T--){
    	long long t ;
    	scanf("%I64d",&t);
    	printf("%I64d\n",power_mod(t,t,10));
    }
	return(0);
}