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>
int main(){ int n,ans; std::cin>>n; ans=(n<=104)?0:(n<=134)?1:(n<=164)?2:(n<=188)?3:(n<=194)?4:5; std::cout<<ans<<std::endl; }