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 n,t=0;
	cin>>n;
	for(int i=1;i<=n;i++){
		if(i==105||i==135||i==165||i==189||i==195) t++;
	}
	cout<<t;
	return 0;
} 