#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
using namespace std;


int main()
{
    int n, cnt = 0;
    cin >> n;
    for (int i = 0; i <= n; i++){
        for (int j = i; j <= n; j++){
            for (int k = j; k <= n; k++){
                if (i+j+k == n){
                    if (i == j && i == k) cnt++;
                    else if (i == j || j == k) cnt += 3;
                    else cnt += 6;
                }
            }
        }
    }
    cout << cnt << endl;
}