#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-9;

bool is_uruu(ll y) {
	if (y % 400 == 0) return true;
	if (y % 100 == 0) return false;
	if (y % 4 == 0) return true;
	return false;
}

int main() {
	vector< vector<int> > a(400, vector<int>(7, -1));
	ll N; cin >> N;
	int x = 0; ll cnt = 0;
	for (ll y = 2014; y <= N;) {
		if (y + 400 <= N) {
			y += 400;
			cnt += 57;
		}
		else {
			if (x == 0) cnt++;
			x += (is_uruu(y + 1) ? 2 : 1);
			x %= 7;
			y++;
		}
	}
	cout << cnt - 1 << endl;
}