#include <stdio.h>
#include <stdlib.h>
int cifra(int x)
{
    int i,s,c,s1=0;
    for (i=1; i<=x; i++)
    {
        c=i;
        s=1;
        while (c>0)
        {
            s*=i;
            c--;
        }
        s1+=s;

    }
    return s1 % 10;
}
int main()
{
    FILE *pf,*pg;
    pf=fopen("cifra.in","r");
    pg=fopen("cifra.out","w");

    int n;
    fscanf(pf,"%d",&n);
    int a[n+1];
    int i;
    for (i=1; i<=n; i++)
    {
    fscanf(pf,"%d",&a[i]);
    cifra(a[i]);
    fprintf(pg,"%d\n",cifra(a[i]));
    }
    return 0;
}