#include <iostream>
using namespace std;

long long int solutie(int putere)
{
	long long int solutie=3;
	long long int R=1;
	while(putere)
	{
        if(putere%2==1)
			R*=solutie;
		solutie*=solutie;
		putere/=2;
	}
	return R;
}

int main()
{
	int n;
	cin>>n;
    int putere=n*(n-1)/2;
    cout<<solutie(putere);
    return 0;
}