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

#include <atcoder/all>
using namespace atcoder;

using ll = long long;
using mint = modint998244353;

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

    ll n;
    cin >> n;
    ll k = n / 500;
    cout << (n - 500 * k < 100 ? k : k + 1) << endl;
}