#include "fstream"

using namespace std;

int factorial(int a)
{
	int fact = 0, produs = 1;
	for(int i = 1; i<=a; i++)
	{
		produs = 1;
		for(int j = 1; j<=i; j++)
			produs = produs * i;
		fact = fact + produs;
	}
	return fact;
}
int main()
{
	ifstream f("cifra.in");
	ofstream g("cifra.out");
	int t,n;
	f>>t;
	for(int i = 1; i<= t; i++)
	{
		f>>n;
		g<<factorial(n) % 10<<endl;
	}
	return 0;
}