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

inputFormat

Input

Input is given from Standard Input in the following format:

N

outputFormat

Output

Print the count.

Examples

Input

105

Output

1

Input

7

Output

0

样例

105

1