#include <fstream>
using namespace std;
ifstream in("patrate2.in");
ofstream out("patrate2.out");
long double x=1;
short n;
int main()
{ in>>n;
  for(short i=1;i<=n*n;i++)
    x=x*2;
  for(short i=1;i<=n;i++)
    x=x*i;
  out<<x;
  in.close();
  out.close();
  return 0;
}