#include<iostream>
#include<fstream>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int pow(int a)
{
    int x = a;
    for(int i = 1; i < a; ++i)
        x *= a;
    return x;
}
int main()
{
    int s=0, t, q;
    f>>t;
    for(int i = 1; i <= t; ++i)
        {
            f>>q;
            s += pow(q);
            g<<s%10<<endl;
        }
}