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 (7.4.4) (judge verdict: Accepted)

<?php

$N = trim(fgets(STDIN));
$count = 0;
$result = [];
for($i=1; $i<=$N; $i++){
    if($i%2 !== 1){
        continue;
    }
    $result = [];
    for($n=1; $n*$n<=$i; $n++){
        if($i%$n == 0){
            $result[] = $n;
            if($i/$n != $n){
                $result[] = $i/$n;
            }
            if(count($result) == 8){
                $count += 1;
            }
        }
    }
    
}
echo $count;
?>