#include <bits/stdc++.h>
using namespace std;
int main()
{
	
	int n,cnt=0;
	cin>>n;
	for (int i=1;i<=n;i+=2){
//		cout<<"i = "<<i<<endl;
		int k=0;
		for (int j=1;j<=i;++j)
			if (i%j==0) k++;
		if (k==8) cnt++;
	}
	cout<<cnt<<endl;
	
}
