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 f(n):
    return len([x for x in range(1, n+1) if (n % x == 0)])

def solve(n):
    return len([x for x in range(105, n+1) if (x % 2 == 1) and (f(x) == 8)])

assert solve(105) == 1
assert solve(7) == 0
print solve(input())