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
a=int(input())
if a<105:print(0)
else:
    print(sum([1 for i in range(105,a+1,2) if len([I for I in range(1,a+1,2) if i%I==0])==8]))