#include <bits/stdc++.h>
using namespace std;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}
using Int = long long;
const char newl = '\n';

//INSERT ABOVE HERE
signed main(){
  cin.tie(0);
  ios::sync_with_stdio(0);

  Int n;
  cin>>n;

  Int ans=0;
  for(Int x=0;x<=n;x++)
    for(Int y=0;y<=n;y++)
      if(0<=n-(x+y)) ans++;

  cout<<ans<<newl;
  return 0;
}