input: def top_k_elements(arr, k):
      """
      This function takes an integer array arr and a positive integer k, and returns a sorted list 
      with the top k elements from arr.
  
      Example 1:
  
          Input: arr = [-3, -4, 5], k = 3
          Output: [-4, -3, 5]
  
      Example 2:
  
          Input: arr = [4, -4, 4], k = 2
          Output: [4, 4]
  
      Example 3:
  
          Input: arr = [-3, 2, 1, 2, -1, -2, 1], k = 1
          Output: [2]
  
      Notes:
          1. The array's length will be between 1 and 1000.
          2. The values in the array will range from -1000 to 1000.
          3. 0 <= k <= len(arr)
      """
output:     
      # Sort the array in descending order to get the largest elements first.
      arr_sorted = sorted(arr, reverse=True)
      
      # Get the top k elements from the sorted array.
      top_k = arr_sorted[:k]
      
      # Sort the top k elements in ascending order as required.
      return sorted(top_k)
  