Problem:
Score: 200 points

Problem Statement

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.

Sample Input 1

105

Sample Output 1

1

Among the numbers between 1 and 105, the only number that is odd and has exactly eight divisors is 105.

Sample Input 2

7

Sample Output 2

0

1 has one divisor. 3, 5 and 7 are all prime and have two divisors. Thus, there is no number that satisfies the condition.

Solution in PHP (5.6.30) (judge verdict: Wrong Answer)

<?php
	fscanf(STDIN, "%d", $N);
	$ans = 0;

	for($i = $N; $i > 103; $i -= 2){
		$cnt = 0;
		for($j = 1; $j <= 13; $j += 2){
			if($i % $j === 0){
				$cnt++;
			}
		}

		if($cnt === 4){
			$ans++;
		}
	}

	print $ans;
?>