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(input())
num=[3*5*7,3*3*3*5,3*5*11,3*3*3*7,3*5*13]
ans=0
for i in range(5):
    if n>=num[i]:
        ans+=1
    else:
        break
print(ans)