#include <bits/stdc++.h>
#define i64 long long

bool isleap(int year) {
    return (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0));
}

const std::vector<int> days = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int y;
    std::cin >> y;
    int now = 1970, mon = 1, day = 0, mark = 4;
    while (now != y) {
        while (mon <= 12) {
            for (day = 1; day <= days[mon - 1] + (mon == 2 && isleap(now)); day++) {
                mark ++;
                mark %= 7;
                if (mark == 0) mark = 7;
            }
            mon++;
        }
        mon = 1;
        now++;
    }
    int curmon = 1, ans = 0, curday = 1, curmark = mark;
    for (curmon = 1; curmon <= 12; curmon++) {
        int cnt = days[curmon - 1] + (isleap(y) && curmon == 2);
        int res = 1, all = 7 - curmark + 1;
        while (all < cnt) {
            res++;
            all += 7;
        }
        ans += res;
        for (curday = 1; curday <= days[curmon - 1] + (isleap(y) && curmon == 2); curday++) {
            curmark = curmark + 1;
            curmark %= 7;
            if (curmark == 0) curmark = 7;
        }
    }
    std::cout << ans << "\n";
    return 0;
}