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: Accepted)

<?php
  $result = 0;
	fscanf(STDIN, "%d", $N);
  for($rem=1;$rem<=$N;$rem+=2){
    $divisor = 0;
    for($i=1;$i<=$rem;$i++){
      if($rem % $i == 0){
        $divisor++;
      }
    }
    if($divisor == 8){
      $result++;
    }
  }
  echo $result;
?>