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
N = int(input())
yakusuu8 = [3**3 * 5, 3**3 * 7, 3*5*7, 3*5*11, 3*5*13]
cnt = 0
for i in yakusuu8:
    if(i<= N):
        cnt += 1

print(cnt)