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())
ans = 0
for i in range(105,N+1,2):
  if len([j for j in range(1,i+1) if i % j == 0]) == 8:
    ans+=1
print(ans)