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
def judge(n):
	lst = []
	for i in range(1, n+1):
		if n%i == 0: lst.append(i)
	if len(lst) == 8: return True
	return False

N = int(raw_input())
index = 1
cnt = 0
while index <= N:
	if judge(index): cnt += 1
	index += 2
print cnt