find-the-median.php

<?php

/*
 * Complete the 'findMedian' function below.
 *
 * The function is expected to return an INTEGER.
 * The function accepts INTEGER_ARRAY arr as parameter.
 */
function findMedian($arr)
{
    sort($arr);

    return $arr[(int)(count($arr) / 2)];
}

$fptr = fopen(getenv("OUTPUT_PATH"), "w");

$n = intval(trim(fgets(STDIN)));

$arr_temp = rtrim(fgets(STDIN));

$arr = array_map('intval', preg_split('/ /', $arr_temp, -1, PREG_SPLIT_NO_EMPTY));

$result = findMedian($arr);

fwrite($fptr, $result . "\n");

fclose($fptr);