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