/**
* @param Difference $difference
*/
public function __construct(Difference $difference)
{
$this->bitmap = $difference->getBitmap();
$this->width = $difference->getWidth();
$this->height = $difference->getHeight();
$this->boundaries = $this->findBoundaries();
}
{
private $elements = array();
public $maximumDifference;
function __construct($arr)
{
$this->elements =& $arr;
}
public function computeDifference()
{
$min = $this->elements[0];
$max = $this->elements[0];
foreach ($this->elements as $value) {
if ($value < $min) {
$min = $value;
}
if ($value > $max) {
$max = $value;
}
}
$this->maximumDifference = $min - $max;
if ($this->maximumDifference < 0) {
$this->maximumDifference *= -1;
}
}
}
//End of Difference class
$N = intval(fgets(STDIN));
$a = array_map('intval', explode(' ', fgets(STDIN)));
$d = new Difference($a);
$d->ComputeDifference();
print $d->maximumDifference;
