<?php

/**
 * @author Petr Brazdil
 * @copyright 2011
 */

$i = -20;
while ($i < 20) {
    $provedlo = false;
    $x = -5;
    $y = $i;
    $c = 0;
    while ($x < $y) {
        $c++;
        $x = $x + 5;
        $y = (int)($x / 5) + $y + 2;
        $provedlo = true;
        if ($c > 30) {
            $c = 0;
            break;
        }
    }
    echo 'A = '.$i.', pocet kroku -> '.$c.'<br>';

    if ($c == 2) {
       // echo 'Hledane -> '.$i.'<br>';
    }
    $i++;
}

?>