[getting started] enter the integer array and sorting ID, and sort its elements in ascending or descending order

describe

Enter an integer array and sort ID , Sort its elements in ascending or descending order

Input description

Enter the number of array elements in the first line
In the second line, enter the array to be sorted , Each number is separated by a space
Enter an integer in the third line 0 or 1.0 For ascending sort ,1 Represents a descending sort

Output description

Output ordered numbers

Example 1

Input ：8
1 2 4 9 3 55 64 25
0
Output ：1 2 3 4 9 25 55 64

Example 2

Input ：8
1 2 4 9 3 55 64 25
0
Output ：1 2 3 4 9 25 55 64

<?php
$num = intval(fgets(STDIN));
$arr = fgets(STDIN);
$flag = intval(fgets(STDIN));

$arr = explode(' ',trim($arr,"\t\n\r"));
$arr = array_slice($arr,0,$num);
if ($flag){
    
  rsort($arr);
  $arr = implode(' ',$arr);
  $arr = trim($arr," \t\n\r");
  echo $arr;
}else{
    
  sort($arr);
  $arr = implode(' ',$arr);
  $arr = trim($arr," \t\n\r");
  echo $arr;
}