#include using namespace std; using ll = long long; using ld = long double; using pll = pair; using vl = vector; template using vec = vector; template using vv = vec>; template using vvv = vv>; template using minpq = priority_queue, greater>; #define rep(i, r) for(ll i = 0; i < (r); i++) #define reps(i, l, r) for(ll i = (l); i < (r); i++) #define rrep(i, l, r) for(ll i = (r) - 1; i >= (l); i--) #define all(a) (a).begin(), (a).end() #define sz(a) (ll)(a).size() template bool chmax(T &a, const T& b) { return a < b ? a = b, true : false; } template bool chmin(T &a, const T& b) { return a > b ? a = b, true : false; } ll modmul(ll a, ll b, ll mod) { ll ret = a * b - mod * ll(1.L / mod * a * b); return ret + mod * (ret < 0) - mod * (ret >= mod); } ll modpow(ll a, ll b, ll mod) { ll ans = 1; for (; b; a = modmul(a, a, mod), b /= 2) if (b & 1) ans = modmul(ans, a, mod); return ans; } using ull = unsigned long long; int solve() { ll n; cin >> n; ll now = 0; while(n - now >= 100) now += 500; cout << now / 500 << endl; return 0; } int main() { ll T = 1; cout << fixed << setprecision(16); // cin >> T; while (T--) solve(); }