#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int64_t n;
    cin >> n;

    int m = 2014;
    int a = (n - m) / 400;
    int b = (n - m) % 400 + m;

    int r = 0;
    int d = 0, c = 0;
    for (int i = m + 1; i <= m + 400; i++) {
        d += 365 + (i % 4 == 0) - (i % 100 == 0) + (i % 400 == 0);
        d %= 7;
        if (d == 0) c++;
        if (i == b) r = c;
    }

    cout << c * a + r << endl;

    return 0;
}