#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");
string s;
char e[105];
int n,i,p=1,j,sm,v[500],m;
int main()
{
    fin>>n;
    for (i=1;i<=99;i++)
    {
        v[i]=i;
        for (j=1;j<i;j++)
        {
            v[i]*=i;
            v[i]=v[i]%10;
        }
        v[i]=v[i]+v[i-1];
        v[i]=v[i]%10;
    }
    for(i=1;i<=n;i++)
    {
        fin>>m;
        fout<<v[m]<<"\n";
    }
    return 0;
}