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
from sys import stdin
def cnt(n):
 if n%2==0:
  return 0
 ans = 0
 for i in xrange(1,n+1):
  if n%i==0:
   ans+=1
 return ans
n = int(stdin.readline())
res = 0
for i in xrange(1,n+1):
 if cnt(i)==8:
  res+=1
print res