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;
	std::cin >> n;

	int c = 0;
	c += 105 <= n ? 1 : 0;
	c += 135 <= n ? 1 : 0;
	c += 165 <= n ? 1 : 0;
	c += 189 <= n ? 1 : 0;
	c += 195 <= n ? 1 : 0;
	std::cout << c << "\n";
	return 0;
}