#include<iostream>
#include<fstream>
using namespace std;
int produs(int n)
{
    int i,j,p=1,s=0;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=i;j++)
        {
            p=p*i;
        }
        s=s+p;
        p=1;
    }
    return s%10;
}
int main()
{
    int i,j,T;
    ifstream fin("cifra.in");
    ofstream fout("cifra.out");
    fin>>T;
    for(j=1;j<=T;j++)
    {
        fin>>i;
        fout<<produs(i)<<"\n";
    }
    fin.close();
    fout.close();
    return 0;
}