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
lst = [105, 135, 165, 189, 195]

n = int(raw_input())
ans = 0
for i in range(0, 5):
	if lst[i] <= n: ans = ans + 1

print ans