#include <stdio.h>

long n, t,i,s,j,c,p;
int main()
{
    FILE*f,*g;
    f=fopen("cifra.in","r");
    g=fopen("cifra.out","w");
    fscanf(f,"%ld\n", &t);
    for(i=1; i<=t; i++)
        {
            fscanf(f,"%ld\n", &n);
            n=i;
            p=1;
            for(j=1; j<=n; j++)
                p=p*n;
            s+=p;
            c=s%10;
            fprintf(g, "%ld\n", c);
        }

    fclose(f);
    fclose(g);
    return 0;
}