#include <bits/stdc++.h>
using namespace std;

#ifdef CKISEKI
#define safe cerr<<__PRETTY_FUNCTION__<<" line "<<__LINE__<<" safe\n"
#define debug(a...) debug_(#a, a)
#define orange(a...) orange_(#a, a)
template <typename ...T>
void debug_(const char *s, T ...a) {
    cerr << "\e[1;32m(" << s << ") = (";
    int cnt = sizeof...(T);
    (..., (cerr << a << (--cnt ? ", " : ")\e[0m\n")));
}
template <typename I>
void orange_(const char *s, I L, I R) {
    cerr << "\e[1;32m[ " << s << " ] = [ ";
    for (int f = 0; L != R; ++L)
        cerr << (f++ ? ", " : "") << *L;
    cerr << " ]\e[0m\n";
}
#else
#define safe ((void)0)
#define debug(...) safe
#define orange(...) safe
#endif

int ans[7122];

int main() {
    cin.tie(nullptr) -> sync_with_stdio(false);

    {
        int cur = 6;
        for (int year = 2023; year <= 2037; ++year) {
            const int ds[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
            for (int i = 0; i < 12; ++i) {
                int d = ds[i];
                if (i == 1) {
                    if (year % 400 == 0 or (year % 4 == 0 and year % 100 != 0))
                        d++;
                }
                ans[year]++;
                for (int j = 0; j < d; ++j) {
                    cur = (cur + 1) % 7;
                    if (cur == 0)
                        ans[year]++;
                }
                ans[year] -= cur == 0;
            }
        }
    }
    {
        int cur = 5;
        for (int year = 2022; year >= 1970; --year) {
            const int ds[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
            for (int i = 11; i >= 0; --i) {
                int d = ds[i];
                if (i == 1) {
                    if (year % 400 == 0 or (year % 4 == 0 and year % 100 != 0))
                        d++;
                }
                ans[year]++;
                for (int j = 0; j < d; ++j) {
                    cur = (cur + 6) % 7;
                    if (cur == 6)
                        ans[year]++;
                }
                ans[year] -= cur == 6;
            }
        }
    }


    int n;
    cin >> n;
    cout << ans[n] << '\n';
    return 0;
}