#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;

ifstream f ("cifra.in");
ofstream g ("cifra.out");


int main()
{
    int n, i, x, a=0;

    f >> n;
    for (i=1; i<= n; i++)
    {
        f >> x;
        a += pow(x, i);
        g << a % 10 << endl;
    }

    return 0;
}