#include <iostream>
#include <fstream>

using namespace std;

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

int n, t, i, x, s, p = 1;

int main()
{
    fin >> t;

    i = 1;

    while(i <= t)
    {
        fin >> x;

        int cop = x;

        for(int j = 1; j <= cop; j++)
            p *= x;

        s += p;
        s = s%10;

        fout << s << endl;

        p = 1;
        i++;
    }


    return 0;
}