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 "bits/stdc++.h"
using namespace std;

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