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
def solve(x):
	res = 0
	for i in xrange(1,x+1):
		if x%i == 0:
			res += 1
	return res

n = input()
ans = 0
for i in xrange(1,n+1):
	if solve(i) == 8 and i&1:
		ans += 1
print ans
