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

#define rep(i, a, b) for (int i = a; i < b; i++)
using ll = long long;

int main(){
	int n;
	cin >> n;
	int ans = n / 500;
	int m = n % 500;
	if(m >= 100) ans++;
	cout << ans << endl;
}