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
B = raw_input()
A = int(B)

if A < 105:
  print 0
  
elif 104 < A < 135:
  print 1

elif 134 < A < 165:
  print 2

elif 164 < A < 189:
  print 3

elif 188 < A < 195:
  print 4
  
elif 194 < A:
  print 5

