#include <bits/stdc++.h>

using namespace std;
int a[1000000];
int main()
{
    int t ,S, i ,j ,n;
    ifstream fin ("cifra.in");
    fin>>t;
    for (i=1;i<=t;i++)
        fin>>a[i];
    fin.close();
    ofstream fout ("cifra.out");
    S=0;
    for (i=1;i<=t;i++)
    {   n=1;
        for (j=1;j<=i;j++)
            n=n*a[i];
        S=S+n%10;
        fout<<S%10<<"\n";
    }
    fout.close();
    return 0;
}