Problem:
Score : 100 points

Problem Statement

A biscuit making machine produces B biscuits at the following moments: A seconds, 2A seconds, 3A seconds and each subsequent multiple of A seconds after activation.

Find the total number of biscuits produced within T + 0.5 seconds after activation.

Constraints

All values in input are integers.

1 \leq A, B, T \leq 20

Input

Input is given from Standard Input in the following format:

A B T

Output

Print the total number of biscuits produced within T + 0.5 seconds after activation.

Sample Input 1

3 5 7

Sample Output 1

10

Five biscuits will be produced three seconds after activation.

Another five biscuits will be produced six seconds after activation.

Thus, a total of ten biscuits will be produced within 7.5 seconds after activation.

Sample Input 2

3 2 9

Sample Output 2

6

Sample Input 3

20 20 19

Sample Output 3

0

Solution in PHP7 (7.0.15) (judge verdict: Wrong Answer)

<?php
$n = trim(fgets(STDIN));
$vArray = explode(" ", trim(fgets(STDIN)));

foreach($vArray as $i => $v){
    $dArray = divisor($v);
    foreach($dArray as $d){
        @$map[$d]++;
    }
}
$max = 1;
foreach($map as $value => $count){
    if($count >= $n - 1){
        $max = max($max, $value);
    }
}
echo $max;

function divisor($n){
    if(!isset($GLOBALS["cache"][$n])){
        for($i = 1; $i <= sqrt($n); $i++){
            if($n % $i == 0){
                $f[] = $i;
                $f[] = $n / $i;
            }
        }
        sort($f);
        $GLOBALS["cache"][$n] = array_unique($f);
    }
    return $GLOBALS["cache"][$n];
}