#include <fstream.h>
int main()
{unsigned long long int t,n,u,i,s,j,k;
ifstream f("cifra.in");
ofstream g("cifra.out");
f>>t;s=0;
for (i=1;i<=n;i++)
  {f>>n;
   for(j=1;j<=n;j++)
     {u=1;
      for (k=1;k<=j;k++) u=u*j;
      u=u%10;
      s=s+u;
      s=s%10;}
   g<<s<<'\n';}
return 0;}