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
c = 0
for i in range(1, int(input())+1):
  if not i%2:
    continue
  if sum(not(i%j) for j in range(1, i+1))==8:
    c += 1
print(c)