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