p03281 AtCoder Beginner Contest 106 - 105
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
```python
import bisect

n = int(input())
print(bisect.bisect([105, 135, 165, 189, 195], n))

```