#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;
ifstream in("cifra.in");
ofstream out("cifra.out");
int main ()
{   int T,v[30000],i,j,k=0,l;
    in>>v[1];
    T=v[1];
    for(i=2;i<=T+1;i++)
        in>>v[i];
    for(i=2;i<=T+1;i++){
        for(j=1;j<=v[i];j++){
            k=k+pow(j,j);}
            out<<k%10<<"\n";
            k=0;}
    in.close();
    out.close();
    return 0;
}