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
import collections
n = int(raw_input())
count = 0
cc= collections.Counter()
for i in range(1,n + 1):
	j = i
	while(j <= n):
		cc[j] += 1
		j +=i
	if i % 2 and cc[i] == 8 :
		count +=1
print count