#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("cifra.in");
ofstream fout("cifra.out");

int main()
{
    int n,s=0,i,j,v[20],aux,a[20],nr=0;
    fin >> n;
    for(i=1;i<=n;i++)
    {
       fin >> v[i];
    }
    for(i=1;i<=n;i++)
    {
        aux=v[i];
        v[i]=1;
        for(j=1;j<=aux;j++)
        {
            v[i]*=aux;
        }
        nr++;
        a[nr]=v[i];
    }
    for(i=1;i<=nr;i++)  { s=s+a[i];  fout << s%10 << endl;}
}