/*
 * author:  ADMathNoob
 * created: 09/10/23 20:19:50
 * problem: https://qoj.ac/problem/7176
 */

/*
Comments about problem:


*/

#include <bits/stdc++.h>

using namespace std;

#ifdef _DEBUG
#include "debug.h"
#else
#define debug(...) 42
#endif

int IsLeap(int year) {
  if (year % 400 == 0) return true;
  if (year % 100 == 0) return false;
  if (year % 4 == 0) return true;
  return false;
}

int Days(int year) {
  if (IsLeap(year)) return 366;
  return 365;
}

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int y;
  cin >> y;
  int at = 3;
  for (int i = 1970; i < y; i++) {
    at += Days(i);
    at %= 7;
  }
  vector<int> days = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
  int ans = 0;
  for (int m = 0; m < 12; m++) {
    int d = days[m];
    if (IsLeap(y) && m == 1) d += 1;
    ans += 1;
    for (int it = 0; it < d; it++) {
      at = (at + 1) % 7;
      if (at == 0 && it < d - 1) ans += 1;
    }
  }
  cout << ans << '\n';
  return 0;
}