#include  "iostream.h"
#include  "fstream.h" 
using namespace std;
int t,n,i;

int putere(int x)
{long int s,p;int j,k;
  p=1;
  for (j=1;j<=x;j++)
  { for (k=1;k<=j;k++) p=p*j;
       
    s=s+p;
    p=1;
  }
  return s%10;  
  
}
int main()
{
 ifstream f("cifra.in");
 ofstream g("cifra.out");
 f>>t;
	t=5;
 for (i=1;i<=t;i++)
 {f>>n;
  g<<putere(n)<<'/n';
 }
 f.close();
 g.close();
 return 0;

}