View Code of Problem 3696

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cctype>
#include<vector>
#include<cmath>
using namespace std;
int main(void){
	int n;
	while(cin>>n){
		if(n==0){
			cout<<1<<endl;continue;
		}
			
		int t=n%10;
		int sum=t;
		for(int i=0;i<n-1;i++){
			sum*=t;
			sum%=10;
		}
		cout<<sum<<endl;
	}
}