#include <algorithm>
#include <bit>
#include <charconv>
#include <cmath>
#include <cstdint>
#include <deque>
#include <functional>
#include <initializer_list>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <map>
#include <numbers>
#include <numeric>
#include <queue>
#include <ranges>
#include <set>
#include <span>
#include <stack>
#include <string>
#include <string_view>
#include <tuple>
#include <vector>

//#include <bits/stdc++.h>

#ifdef DEBUG
# include <format>
# include <print>
#endif

namespace tomolatoon
{
	using namespace std::views;

	using std::cin;
	using std::cout;
	using std::endl;

	using std::array;
	using std::deque;
	using std::map;
	using std::multimap;
	using std::multiset;
	using std::pair;
	using std::queue;
	using std::set;
	using std::span;
	using std::stack;
	using std::string;
	using std::string_view;
	using std::tuple;
	using std::vector;
	using std::ranges::subrange;

	template <class T>
	using vec = vector<T>;

	using uint = uint32_t;

	using ull = uint64_t;
	using ll  = int64_t;

	// clang-format off
	using std::ranges::all_of;
	using std::ranges::any_of;
	using std::ranges::none_of;
	using std::ranges::for_each;
	using std::ranges::for_each_n;
	using std::ranges::find;
	using std::ranges::find_if;
	using std::ranges::find_if_not;
	using std::ranges::find_end;
	using std::ranges::find_first_of;
	using std::ranges::adjacent_find;
	using std::ranges::count;
	using std::ranges::count_if;
	using std::ranges::mismatch;
	using std::ranges::equal;
	using std::ranges::search;
	using std::ranges::search_n;
	// clang-format on

	using std::ranges::sort;
	using std::ranges::stable_sort;
	using std::ranges::unique;

	using std::ranges::max_element;
	using std::ranges::min_element;

	using std::ranges::binary_search;
	using std::ranges::equal_range;
	using std::ranges::lower_bound;
	using std::ranges::upper_bound;

	using std::ranges::next_permutation;
	using std::ranges::prev_permutation;

	using std::ranges::begin;
	using std::ranges::distance;
	using std::ranges::end;
	using std::ranges::ssize;
	using std::ranges::swap;

	// for (auto i : iota(0, n)) を使う
	namespace rng = std::ranges;

	using std::back_inserter;
	using std::front_inserter;
	using std::inserter;

	using namespace std::placeholders;

	void yn(bool f)
	{
		cout << (f ? "Yes" : "No") << endl;
	}

	string yns(bool f)
	{
		return f ? "Yes" : "No";
	}

	struct P
	{
		using type = ll;

		type i;
		type j;

		P moved(type id, type jd) const
		{
			return {i + id, j + jd};
		}

		P moved(P pd) const
		{
			return moved(pd.i, pd.j);
		}

		template <class T>
		T& operator[](vec<vec<T>>& v) const
		{
			return v[i][j];
		}

		char& operator[](vec<string>& v) const
		{
			return v[i][j];
		}

		friend bool operator==(const P& lhs, const P& rhs)
		{
			return lhs.i == rhs.i && lhs.j == rhs.j;
		}

		friend auto operator<=>(const P& lhs, const P& rhs)
		{
			return lhs.i != rhs.i ? lhs.i <=> rhs.i : lhs.j <=> rhs.j;
		}
	};

	// clang-format off
	auto in_f = [](P::type h, P::type w) { return [=](P p) { return 0 <= p.i && p.i < h && 0 <= p.j && p.j < w; }; };

	static const auto P4 = array<P, 4>{P{-1,  0}, P{ 0, -1}, P{ 1,  0}, P{ 0,  1}};
	static const auto P8 = array<P, 8>{P{-1,  0}, P{-1, -1}, P{ 0, -1}, P{ 1, -1}, P{ 1,  0}, P{ 1,  1}, P{ 0,  1}, P{-1,  1}};
	// clang-format on

	ll pow(ll base, ll pow)
	{
		ll res = 1;
		for (auto i : iota(0, pow))
		{
			res *= base;
		}
		return res;
	}

	template <class T>
	T shared_length(T l1, T r1, T l2, T r2)
	{
		return rng::max(0, rng::min(r1, r2) - rng::max(l1, l2));
	}

	namespace detail
	{
		using namespace std::ranges;

		template <input_range R, std::output_iterator<std::pair<range_value_t<R>, size_t>> I>
		requires std::copyable<range_value_t<R>> && std::equality_comparable<range_value_t<R>>
		void run_length(R&& t, I out)
		{
			using pair = std::pair<range_value_t<R>, size_t>;

			auto it = begin(t);
			auto e  = end(t);

			if (it == e)
			{
				return;
			}

			size_t           size = 1;
			range_value_t<R> prev = *it;

			++it;

			for (; it != e; ++it)
			{
				if (*it == prev)
				{
					++size;
				}
				else
				{
					*out++ = pair(std::move(prev), size);
					prev   = *it;
					size   = 1;
				}
			}

			*out++ = pair(std::move(prev), size);
		}
	} // namespace detail

	using detail::run_length;

	namespace detail
	{
		template <size_t N>
		struct get
		{
			template <class T>
			constexpr decltype(auto) operator()(T&& t) const noexcept(noexcept(std::get<N>(t)))
			{
				return std::get<N>(t);
			}
		};
	} // namespace detail

	template <size_t N>
	inline constexpr auto get = detail::get<N>{};

} // namespace tomolatoon

#include <atcoder/all>

namespace tomolatoon
{
	using atcoder::dsu;
} // namespace tomolatoon

namespace tomolatoon
{
	int idx(char c)
	{
		switch (c)
		{
		case 'M': return 0;
		case 'E': return 1;
		case 'X': return 2;
		}
	}

	int mex(int a, int b, int c)
	{
		set<int> s;
		s.insert(a);
		s.insert(b);
		s.insert(c);
		for (auto i : iota(0, 4))
		{
			if (s.find(i) == s.end())
			{
				return i;
			}
		}
	}

	void solve()
	{
		int n;
		cin >> n;

		int div = n / 500;
		int mod = n % 500;

		if (mod <= 100)
		{
			cout << div;
		}
		else
		{
			cout << div + 1;
		}
	}
} // namespace tomolatoon

int main()
{
	std::cin.tie(nullptr);
	std::ios::sync_with_stdio(false);
	std::cout << std::fixed << std::setprecision(16);

	tomolatoon::solve();

	std::cout << std::flush;
}