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

using ll = int64_t;

ll N;

void input() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> N;
}

void solve() {
    cout << (N - 100) / 500 + 1<< "\n";
}

int main() {
    input();
    solve();
    return 0;
}