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 PHP7 (7.0.15) (judge verdict: Accepted)

<?php
$input=explode(' ',trim(fgets(STDIN)));
$n=intval($input[0]);

$cnt_1 = 0;
for($i = 1; $i <= $n; $i+=2){
  $cnt_2 = 0;
  for($j = 1; $j <= $i; $j++){
    if($i % $j == 0){
      $cnt_2++;
    }
  }
  if($cnt_2 == 8){
    $cnt_1++;
  }
}

echo $cnt_1;
?>