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(void)
{
	int a,x;
	cin>>a;
	x=0;
	if(a>=105) x++;
	if(a>=135) x++;
	if(a>=165) x++;
	if(a>=189) x++;
	if(a>=195) x++;
	cout<<x<<endl;
	return 0;
}