PHP Decode

<?php 
include 'flag.php'; 
highlight_file("index.php"); 
if (isset($_GET['x']) and isset($_GET['y']) and isset($_GET['z'])) { 
    $a = floatval($_GET['x']); 
    $b = floatval($_GET['y']); 
    $c = floatval($_GET['z']); 
    if ($a <= 0 or $b <= 0 or $c <= 0) 
        echo '<p>Under Zero</p>'; 
    else if ($a >= 1000000 or $b >= 1000000 or $c >= 1000000) 
        echo '<p>Over Million</p>'; 
    else if ($a ** 3 + $b ** 3 == $c ** 3) 
        echo '<p>'.$flag.'</p>'; 
    else 
        echo '<p>No Flag</p>'; 
} 
?>