#include <iostream>
#include <fstream>
#include <cmath>

using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");

int main()
{
    long long N, T, sum = 0;
    fin >> T;
    long long vector[T];
    for (int i = 0; i < T; i++)
    {
        fin >> N;
        vector[i] = N;
    }
    for (int i = 0; i < T; i++)
    {
        for (int j = 1; j <= vector[i]; j++)
            sum += pow[j][j];
        vector[i] = sum;
        sum = 0;
    }
    for (int i = 0; i < T; i++)
        fout << vector[i] % 10;
    return 0;
}