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())
ans = 0
for i in range(1, N+1):
    num = 0
    if i%2 != 0:
        for j in range(1, N+1):
            if i%j == 0:
                num = num + 1
#        print i, num                                                                                  
        if num == 8:
            ans = ans + 1

print ans
