#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using i128 = __int128_t;
using uc = unsigned char;
#define Max(X,Y) (((X) > (Y)) ? (X) : (Y))
#define Min(X,Y) (((X) < (Y)) ? (X) : (Y))
#define yes cout << "Yes" << endl;
#define no cout << "No" << endl;
#define YES yes return 0;
#define NO no return 0;
#define pc cout << count << endl;
#define PC pc return 0;
#define INF 0x1fffffff
#define Eps LDBL_EPSILON
#ifdef DEBUG
#define dbg(X) cerr << X << endl
#else
#define dbg(...)
#endif

template <typename T>
inline ostream& operator<<(ostream& os, const vector<T>& v) noexcept {
    if(!v.empty()) os << v[0];
    for(size_t i = 1; i < v.size(); i++) os << " " << v[i];
    return os;
}

template <typename T>
void swap(T& a, T& b) {
    auto x = a;
    a = b;
    b = x;
}

template <typename T>
size_t partition(vector<T>& list, size_t start, size_t end) {
    auto pivot = list[end-1];
    auto hi = start;
    for(auto i = start; i < end - 1; i++) {
        if(list[i] <= pivot) {
            swap(list[hi], list[i]);
            hi++;
        }
    }
    swap(list[hi], list[end-1]);
    return hi;
}

template <typename T>
void quicksort(vector<T>& list, size_t l, size_t r) {
    if(l < r) {
        auto pivot = partition(list, l, r);
        quicksort(list, l, pivot);
        quicksort(list, pivot + 1, r);
    }
}

struct string_set {
    map<size_t, vector<string_view>> registry = {};
    bool contains(string_view s) {
        auto h = hash<string_view>()(s);
        return registry.contains(h)
                && find(registry[h].begin(), registry[h].end(), s) != registry[h].end();
    }
    void add(string_view s) {
        auto h = hash<string_view>()(s);
        auto pos = find(registry[h].begin(), registry[h].end(), s);
        if(pos != registry[h].end()) return;
        registry[h].push_back(s);
    }
    void remove(string_view s) {
        auto h = hash<string_view>()(s);
        if(!registry.contains(h)) return;
        auto pos = find(registry[h].begin(), registry[h].end(), s);
        if(pos == registry[h].end()) return;
        registry[h].erase(pos);
    }
};

template <typename T>
struct BIT {
    ll n;
    vector<T> tree;
    BIT(ll size) : n(size + 1), tree(n, 0) {}
    void add(ll i, T x) {
        for (ll idx = i; idx < n; idx += (idx & -idx)) {
            tree[idx] += x;
        }
    }
    T sum(ll i) {
        T s(0);
        for (ll idx = i; idx > 0; idx -= (idx & -idx)) {
            s += tree[idx];
        }
        return s;
    }
};

int main() {
    cin.tie(nullptr);

    ll N;
    cin >> N;
    ll m = N/500;
    if(N%500 >= 100) m++;
    cout << m << endl;
}