#include <bits/stdc++.h>
#define MOSTAFAOSMAN() ios_base::sync_with_stdio(false);cout.tie(NULL),cin.tie(NULL);
#define ll long long
#define ld long double
#define outCondtion(a) cout<<((a)?"YES":"NO")<<"\n";
#define tloop int t;cin>>t;cin.ignore();while(t--)
#define endl "\n"
#define inf 0x3f3f3f3f3f3f3f3fLL
#define debug(x) cout<<"debug "<<(#x)<<": "<<x<<endl<<flush;
#define int long long
using namespace std;

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

signed main() {
    MOSTAFAOSMAN()
    solve();

    return 0;
}