using namespace std;

#include <iostream>
#include <fstream>

int power(int x,int y){
	int d=x;
	while(y--)
		x=(x*d)%10;
    return x;
}

int cifra(long long n){
	int s=0;
	while(n--)
	s = s + (power(n,n))%10;
	return s;
}

int main()
{
	int t,s;
	long long n;
	ifstream f("cifra.in");
	ofstream g("cifra.out");
	f>>t;
	while(t--){
		f>>n;
		s=(cifra(n))%10;
		g<<s<<endl;
	}
	return 0;
}