#include<fstream>
#include<cstdlib>
#include<iostream>
using namespace std;
char s[1000000];
long ultim(long x)
{long i,j,p,S=0;
    for(i=1;i<=x;i++)
    {p=1;
        for(j=1;j<=i;j++)
p=(p*i)%10;
S=(S+p)%10;}
return S;
}
int main()
{long i,j,v[1000],n,y;
    ifstream f("cifra.in");
    ofstream g("cifra.out");
    for(i=1;i<=1000;i++)
        v[i]=ultim(i);
f>>n;
    for(j=1;j<=n;j++)
    {
        f>>s;
        y=atoi(s);
        g<<v[y]<<'\n';

    }
}