// patrate2.cpp : Defines the entry point for the console application.
//

#include <stdio.h>

int main()
{
	long double i,n,a=1,e=1,w=1;
	FILE *f1,*f2;
	f1=fopen("patrate2.in","r");
	f2=fopen("patrate2.out","w");
	fscanf(f1,"%Lf",&n);
	for(i=1;i<=n;i++)
		a=a*i;
	for(i=1;i<=n*n;i++)
		e=e*2;
	w=e*a;
	fprintf(f2,"%Lf",w);
	fclose(f1);
	fclose(f2);


	return 0;
}