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())+1
res=0
for i in range(1,n):
	if i%2==0:
		continue
	s=0
	for j in range(1,i+1):
		if i%j==0:
			s+=1
	if s==8:
		res+=1
print(res)