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())
num=0
for i in range(N+1)[1::2]:
	able=1
	for j in range((N//2)+1)[1:]:
		if i%j==0:
			able+=1
	if able==8:
		num+=1
print(num)