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
import math
n = int(raw_input())
count = 0
for i in range(101,n+1,2):
	cuenta = 0
	for j in range(1,int(math.floor(i**0.5)+1),2):
		if i == j ** 2:
			cuenta += 1
		elif i % j == 0:
			cuenta += 2

	if cuenta == 8:
		count += 1

print count