#include <stdio.h>
#include <stdlib.h>

int main()
{
    FILE *fin, *fout;
    int t, j, i, p, a, aux=0, k;
    fin=fopen("cifra.in", "r");
    fscanf(fin, "%d", &t);
    fout=fopen("cifra.out", "w");
    for(i=1;i<=t;i++)
    {
        k=1;
        fscanf(fin, "%d", &a);
        for(j=1;j<=a;j++)
            k=k*a;
        p=aux+k;
        aux=p;
        fprintf(fout, "%d\n", p%10);
    }
    fclose(fin);
    fclose(fout);
    return 0;
}