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

int main()
{
    int n,s,i,j,c,t;
    ifstream in("cifra.in");
    ofstream out("cifra.out");
    in>>n;
    s=0;
    for(i=1;i<=n;i++)
    {
        c=1;
        in>>t;
        for(j=1;j<=t;j++)
        {
            c=c*i;
        }
        s=s+c;
        s=s%10;
        out<<s<<endl;
    }
    return 0;
}