#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");
int n,t,v[100];
int suma(int x)
{   int s=0;
    for(int i=1;i<=x;i++)
        s=s+pow(i,i);
    return s;
}
int ultc(int x)
{
    return x%10;
}
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>v[i];
    for(int i=1;i<=n;i++)
        fout<<ultc(suma(v[i]))<<endl;
    return 0;
}