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
x = 0
for i in range(1 , int(input()) + 1):
    if i == 105 or i == 135 or i == 165 or i == 189 or i == 195:
        x += 1
print(x)