barakpinchovski

<?php

$exampleArray = [9, 10 , 20 , 20 ,10 ,10 ,30 ,50 ,10 ,20];
$len = count($exampleArray);
    
echo sockMerchant($len, $exampleArray);

// Assumptions for sockMerchant function:
// 1. $n is the actual size of $ar (derived from count($ar))
// 2. $ar values are: