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(raw_input())

count = 0
for i in range(1, n+1):
    if i % 2 == 0:
        continue

    c = 0
    for j in range(1, n+1):
        if i % j == 0:
            c += 1
    if c == 8:
        count += 1
print(count)
