public static function balancear(BinTree &$bt)
{
$e = $bt->maior_afluente();
if ($e != null) {
$e->parent_node = $bt->parent_node;
$bt->parent_node = null;
$bt->setEsquerda(null);
$bt->setDireita(null);
$e->inserir($bt);
$bt = $e;
}
}
