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())

def f(n):
  return sum(1  for i in range(1,n+1) if n % i ==0)

print(sum(1 for i in range(1,N+1) if i % 2 >0 and f(i)==8))

