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

using ll = long long;
using ld = long double;
using pii = pair<int, int>;
using vi = vector<int>;
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define smx(a, b) a = max(a, b);
#define smn(a, b) a = min(a, b);
#define pb push_back
#define endl '\n'

const ll MOD = 1e9 + 7;
const ld EPS = 1e-9;

mt19937 rng(time(0));

int main() {
	cin.tie(0)->sync_with_stdio(0);


    map<int, int> ans;
    int off = 3;
    int days[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30 ,31, 30, 31};
    for(int year = 1970; year <= 2037; year++) {
        if(year % 4 == 0) {days[1] = 29;}
        else {days[1] = 28;}
        int w = 0;
        for(int m = 0; m < 12; m++) {
            w += (days[m] - 1 + off + 7) / 7;
            off = (days[m] + off) % 7;
        }
       // cout << w << " " << off << endl;
        ans[year] = w;
    }

    int n; cin >> n;
    cout << ans[n] << endl;
}