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,a=0; cin>>n;
  for(int i=1; i<=n; i++){
    int c=0;
    for(int j=1; j<=i; j+=2) if(i%j==0) c++;
    if(c==8) a++; 
  }
  cout<<a;
}