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
#abc106b
import sys

n=int(raw_input())
res=0
for i in xrange(1,n+1):
 cnt=0
 for j in xrange(1,i+1,2):
  if i%j==0:
   cnt+=1
 if cnt==8:
  res+=1
print res
