#include <fstream>
#include <math.h>
using namespace std;

ifstream f("cifra.in");
ofstream g("cifra.out");

int main()
{
    int t, v[101], i, s = 0, j, n;
    f >> n;
    for (i = 1; i <= n; i ++)
        f >> v[i];
    for (i = 1; i <= n; i ++)
    {
        for (j = 1; j <= v[i]; j ++)
            s = s + pow (j, j);
        g << s % 10 << endl;
        s = 0;
    }
    return 0;
}