#include "math.h"
#include "fstream.h"

int main()
{
    int t;
    unsigned long  *n,i,s,k,o,*v;
    ifstream f("cifra.in");
    ofstream g("cifra.out");



    f>>t;
    for (i=1;i<=t;i++)
       f>>n[i];
    k=0;
    do
       {
       k++;
       s=0;
       o=n[k];
       for (i=1;i<=o;i++)
	  s=s+pow(i,i);
       v[k]=s % 10;
       }
    while (k<t);
    for (i=1;i<=k;i++)
       g<<v[i]<<"\n";
    f.close();
    g.close();
    return 0;
}