// Cifra.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;
int t,n,s,x;
int main()
{
	ifstream fin("cifra.in");
	ofstream fout("cifra.out");
	fin >> t;
	for (int j = 1; j <= t; j++)
	{
		fin >> n;
		x = 0;
		s = 0;
		for (int i = 1; i <= n; i++)
		{
			x = pow(i, i);
			s += x;

		}
		fout << s % 10<<endl;
	}
	fin.close();
	fout.close();
	
	
	
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file