#include<fstream>
using namespace std;

int main()
{
	long n,cn;
	ifstream f("patrate2.in");
	ofstream o("patrate2.out");
	f>>n;
	cn=n;
	n=n*n;
	n=n*cn;
	if(cn>=2)
		n=n*4;
	else
		n=n*2;
	o<<n;
}