#pragma GCC optimize("Ofast")
#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<vector>
#include<string.h>
#include<math.h>
#include<map>
#include<iomanip>
#include<queue>

const long long INF = 1e17+7;
const long long MOD = 1e9+7;
const double PI=acos(-1);

using namespace std;

int main(){
	int n;
	cin >> n;
	int ans=0;
	for(int i=0;i<=n;i++){
		for(int j=0;j<=n;j++){
			int k=n-i-j;
			if(0<=k && k<=n)ans++;
		}
	}
	cout << ans << endl;
	return 0;
}