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 func(m):
    return sum([m%i==0 for i in range(1, m+1)])
N = int(input())
print(sum([func(i)==8 for i in range(1, N+1, 2)]))