#include <iostream>
#include <fstream>

using namespace std;
ifstream in("Cifra.in");
ofstream out("Cifra.out");

int putere (int a, int b) {
    int p, i;
    p = 1;
    for (i = 1; i <= b; i++) {
        p = p * a;
    }
    return p;
}

int main() {
    int n, i, nr, put = 0;
    in >> n;
    for (i = 1; i <= n; i++) {
        in >> nr;
        put += putere(nr, nr);
        out << put % 10 << endl;
    }

    return 0;
}