#include <bits/stdc++.h>
using namespace std;

int main()
{
	int N;
	cin >> N;

	long long ans = 0;
	for( int x = 0; x <= N; x++ ) {
		for( int y = 0; y <= N; y++ ) {
			int z = N - x - y;
			if( 0 <= z && z <= N ) ans++;
		}
	}

	cout << ans << endl;
}