Probleminha do HackerRank

probleminha.php

<?php

$handle = fopen ("php://stdin", "r");
function equalizeArray($arr) {
    $diff = 0;
    $d = [];
    foreach($arr as $item) {
        @$d[$item]++;
    }
    
    $tot = count($arr);
    $frequent = array_values($d)[0];
    $tofix = $tot - $frequent;
    
    return $tofix;
}

fscanf($handle, "%i",$n);
$arr_temp = fgets($handle);
$arr = explode(" ",$arr_temp);
$arr = array_map('intval', $arr);
$result = equalizeArray($arr);
echo $result . "\n";

?>