#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define rep(i, r) for(int i = 0; i < (int)(r); i++)
#define reap(i, k, r) for(ll i = (ll)(k); i < (ll)(r); i++)
#define ALL(x) std::begin(x), std::end(x)
#define rALL(x) std::rbegin(x), std::rend(x)
#define MOD 998244353
using namespace std;
int main(){
    ll N; cin >> N;
    N -= 100;
    cout << N / 500 + 1 << endl;
}