#include <iostream>
#include <string>
#include <fstream>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int table[] = {
    0, 0, 0, 0, 1, 1, 1, 1, 6, 2, 4, 8, 1, 3, 9, 7, 6, 4, 6, 4,
    5, 5, 5, 5, 6, 6, 6, 6, 1, 7, 9, 3, 6, 8, 4, 2, 1, 9, 1, 9
};

int unit_digit(int n, int a)
{
    return table[((n%10)<<2)+(a&3)];
}

int main()
{
    int n;
    int s=0,c;
    f>>n;
    for(int i=1;i<=n;i++)
        {
            f>>c;
            s=(s+unit_digit(c,i))%10;
            g<<s<<'\n';
        }

    return 0;
}