#include <bits/stdc++.h>
using namespace std;
#define L(i, l, r) for(ll i = (l); i < (r); i++)
#define R(i, l, r) for(ll i = (l); i > (r); i--)
#define all(x) (x).begin(), (x).end()
#define sz(x) (ll)((x).size())
using ll = long long;
using vl = vector<ll>;
using vvl = vector<vector<ll>>;
using pl = pair<ll, ll>;

int main() {
  ll n;
  cin >> n;
  
  ll ans = 0;
  L(i, 0, n / 500 + 1){
    ans++;
    if(n - 500 < 100) break;
   }
   cout << ans <<endl;
}