#include <stdio.h>
#include <math.h>

int n, a[100];

void citire()
{
    FILE *f;
    f = fopen("cifra.in", "r");
    fscanf(f, "%d", &n);
    for(int i = 1; i <= n; i++)
        fscanf(f, "%d", &a[i]);
    fclose(f);
}

int ultima_cifra(int k)
{
    return k%10;
}

int calc_suma(int k)
{
    int S = 0;
    for(int i = 1; i <= k; i++)
    {
        S += pow(i,i);
    }
    return S;
}

int main()
{
    FILE *g;
    g = fopen("cifra.out", "w");
    citire();
    for(int i = 1; i <= n; i++)
    {
        fprintf(g, "%d\n", ultima_cifra(calc_suma(a[i])));
    }
    fclose(g);
}