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
x=int(input())
ans=0
y=0
for i in range(1,x+1):
	y=0
	for j in range(1,x+1):
		if i%j==0 and i%2==1:
			y=y+1
	if y==8:
		ans=ans+1
print(ans)