The number 105 is quite special - it is odd but still it has eight divisors. Now, your task is this: how many odd numbers with exactly eight positive divisors are there between 1 and N (inclusive)?

Constraints

* N is an integer between 1 and 200 (inclusive).

Input

Input is given from Standard Input in the following format:


N


Output

Print the count.

Examples

Input

105


Output

1


Input

7


Output

0
#include <iostream>
using namespace std;

int main() {
	int n,k=0;
	cin>>n;
	if(n>=105) k++;
		if(n>=135) k++;
	if(n>=165) k++;
		if(n>=195) k++;
		if(n>=189) k++;
		
		cout<<k<<endl;
	return 0;
}