code: 
  
  
  from __future__ import annotations
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: list[list[int]]	,	SCREAMING_SNAKE_CASE_				: list[list[int]]      ):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							assert len(SCREAMING_SNAKE_CASE_      ) == len(SCREAMING_SNAKE_CASE_      )
  
  							a_       :   Optional[Any]			=	len(SCREAMING_SNAKE_CASE_      )
  							a_       :   Tuple			=	list(range(SCREAMING_SNAKE_CASE_      )      )
  							a_       :   Optional[int]			=	[-1] * n  # who the donor has donated to
  							a_       :   List[Any]			=	[-1] * n  # who the recipient has received from
  							a_       :   Optional[int]			=	[0] * n
  
  							while unmatched_donors:
  														a_       :   Any			=	unmatched_donors[0]
  														a_       :   Optional[int]			=	donor_pref[donor]
  														a_       :   str			=	donor_preference[num_donations[donor]]
  														num_donations[donor] += 1
  														a_       :   Any			=	recipient_pref[recipient]
  														a_       :   List[Any]			=	rec_record[recipient]
  
  														if prev_donor != -1:
  																					if rec_preference.index(SCREAMING_SNAKE_CASE_      ) > rec_preference.index(SCREAMING_SNAKE_CASE_      ):
  																												a_       :   Union[str, Any]			=	donor
  																												a_       :   List[str]			=	recipient
  																												unmatched_donors.append(SCREAMING_SNAKE_CASE_      )
  																												unmatched_donors.remove(SCREAMING_SNAKE_CASE_      )
  														else:
  																					a_       :   List[str]			=	donor
  																					a_       :   str			=	recipient
  																					unmatched_donors.remove(SCREAMING_SNAKE_CASE_      )
  							return donor_record
  
  
  
style_context: 
  
  
  from __future__ import annotations
  
  
  
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: list      ):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   Tuple			=	sorted(SCREAMING_SNAKE_CASE_      )
  							a_       :   Tuple			=	len(SCREAMING_SNAKE_CASE_      )
  							a_       :   Tuple			=	length >> 1
  							return (
  							    (sorted_list[mid_index] + sorted_list[mid_index - 1]) / 2
  							    if length % 2 == 0
  							    else sorted_list[mid_index]
  							)
  
  
  
  
  
  def 						_lowerCamelCase		(							):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							import doctest
  
  							doctest.testmod()
  
  
  if __name__ == "__main__":
  	main()
  
  
  