#include <bits/stdc++.h>
using namespace std;
#define INF 1000000000
#define MOD 1000000007
#define FOR(i, a, b) for(int i = (int)(a); i < (int)(b); i++)
#define REP(i, b) FOR(i, 0, b)
#define ALL(x) (x).begin(),(x).end()
typedef long long ll;
#define endl '\n'

int main() {
  int n;
  cin >> n;
  int c = 0;
  for(int pg = 0; pg * 3 <= n; pg++) {
    for(int t = 0; t * 5 <= n - pg * 3; t++) {
      int g = (n - (pg * 3 + t * 5)) / 2;
      if(g <= t && (t * 5 + g * 2 + pg * 3) == n) {
        c++;
      }
    }
  }
  cout << c << endl;
  return 0;
}