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
line = raw_input()
n = int(line)
# 3 5 7 105
# 3 3 3 5 135
# 3 5 11 165
# 3 3 3 7 189
# 3 5 13 195
r = [105, 135, 165, 189, 195]

print len([i for i in r if n >= i])
