






"""simple docstring"""


from __future__ import annotations




def 				a (     UpperCamelCase_							:				list[list[int]]     ,	UpperCamelCase_							:				list[list[int]]		)  ->		Union[str, Any]:
 assert len(UpperCamelCase__		) == len(UpperCamelCase__		)

 __A	:       Optional[Any]       =	len(UpperCamelCase__		)
 __A	:       Dict       =	list(range(UpperCamelCase__		)		)
 __A	:       Optional[Any]       =	[-1] * n  # who the donor has donated to
 __A	:       Optional[Any]       =	[-1] * n  # who the recipient has received from
 __A	:       int       =	[0] * n

 while unmatched_donors:
  __A	:       str       =	unmatched_donors[0]
  __A	:       List[Any]       =	donor_pref[donor]
  __A	:       Tuple       =	donor_preference[num_donations[donor]]
  num_donations[donor] += 1
  __A	:       str       =	recipient_pref[recipient]
  __A	:       List[Any]       =	rec_record[recipient]

  if prev_donor != -1:
   if rec_preference.index(UpperCamelCase__		) > rec_preference.index(UpperCamelCase__		):
    __A	:       str       =	donor
    __A	:       str       =	recipient
    unmatched_donors.append(UpperCamelCase__		)
    unmatched_donors.remove(UpperCamelCase__		)
  else:
   __A	:       Optional[int]       =	donor
   __A	:       List[Any]       =	recipient
   unmatched_donors.remove(UpperCamelCase__		)
 return donor_record













"""simple docstring"""


from __future__ import annotations

from typing import Any






class __a   :



  def __init__(self  :		Optional[Any]				,			lowercase_  :		Any				,			lowercase_  :		Any   )		->							None:  # noqa: A002
   __A	:       Optional[Any]       =	item
   __A	:       Union[str, Any]       =	next






class __a   :



  def __init__(self  :		Tuple   )		->							None:
   __A	:       Node | None       =	None
   __A	:       Dict       =	0



  def 						A_				(self  :		str				,			lowercase_  :		Any   )		->							None:
   __A	:       Dict       =	Node(lowercase_				,			self.head   )
   self.size += 1



  def 						A_				(self  :		Optional[int]   )		->							Any:
   # Switched 'self.is_empty()' to 'self.head is None'
   # because mypy was considering the possibility that 'self.head'
   # can be None in below else part and giving error
   if self.head is None:
    return None
   else:
    __A	:       Dict       =	self.head.item
    __A	:       List[str]       =	self.head.next
    self.size -= 1
    return item



  def 						A_				(self  :		List[str]   )		->							bool:
   return self.head is None



  def __str__(self  :		Any   )		->							str:
   if self.is_empty():
    return ""
   else:
    __A	:       List[str]       =	self.head
    __A	:       Union[str, Any]       =	''
    __A	:       list[str]       =	[]
    while iterate:
     item_list.append(str(iterate.item   )   )
     __A	:       List[str]       =	iterate.next

    __A	:       str       =	' --> '.join(lowercase_   )

    return item_str



  def __len__(self  :		Union[str, Any]   )		->							int:
   return self.size





