#include<bits/stdc++.h>
using namespace std;
long long n;
int main() {
	cin >> n;
	if (n < 100) {
		cout << "00\n";
	} else if (n <= 5000) {
		cout << '0' << n / 100 << "\n";
	} else if (n <= 30000) {
		cout << n / 1000 + 50 << "\n";
	} else if (n <= 70000) {
		cout << (n / 1000 - 30) / 5 + 80 << "\n";
	} else {
		cout << 89 << "\n";
	}
}