#include using namespace std; using ll = long long; bool chmin(auto &a, auto b) { return a > b ? a = b, true : false; } bool chmax(auto &a, auto b) { return a < b ? a = b, true : false; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int N; cin >> N; int T = 0, ans = 0; while (N >= T + 100) { T += 500; ans++; } cout << ans << endl; }