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())
co=0
a=0
for j in range(1,N+1):
	if j%2==1:
		for i in range(1,j+1):
			if j%i==0:
				co=co+1
	if co==8:
		a=a+1
	co=0
print(a)
