#include<bits/stdc++.h>
#define int long long
using namespace std;
int y(int a) {
	int sum = 0;
	for (int i = 1; i <= a; i++) {
		if (a % i == 0) {
			sum++;
		}
	}
	return sum;
}
int n, ans;
signed main() {
	cin >> n;
	for (int i = 1; i <= n; i++) {
		if (y(i) == 8) {
			ans++;
		}
	}
	cout << ans << "\n";
	return 0;
}