
"""simple docstring"""


from __future__ import annotations







class 			lowerCAmelCase_			:



						'''simple docstring'''


						def __init__(	self       : Dict					,A_       : int )       ->				None:
							A  				=				value
							A  				=				None
							A  				=				None







class 			lowerCAmelCase_			:



						'''simple docstring'''


						_lowerCamelCase:      int


						def __init__(	self       : int )       ->				None:
							A  				=				0


						def   _SCREAMING_SNAKE_CASE (	self       : Optional[int]					,A_       : Node | None					,A_       : int )       ->				None:
							if node is None:
								return

							if path_sum == self.target:
								self.paths += 1

							if node.left:
								self.depth_first_search(node.left					,path_sum + node.left.value )
							if node.right:
								self.depth_first_search(node.right					,path_sum + node.right.value )




						def   _SCREAMING_SNAKE_CASE (	self       : List[Any]					,A_       : Node | None					,A_       : int | None = None )       ->				int:
							if node is None:
								return 0
							if target is not None:
								A  				=				target

							self.depth_first_search(A_					,node.value )
							self.path_sum(node.left )
							self.path_sum(node.right )

							return self.paths


if __name__ == "__main__":
		import doctest

		doctest.testmod()

"""simple docstring"""


from __future__ import annotations






def  _snake_case			(						snake_case__				:       list[list[int]]		, snake_case__				:       list[list[int]]       ):
	assert len(snake_case__       ) == len(snake_case__       )

	A  				=				len(snake_case__       )
	A  				=				list(range(snake_case__       )       )
	A  				=				[-1] * n  # who the donor has donated to
	A  				=				[-1] * n  # who the recipient has received from
	A  				=				[0] * n

	while unmatched_donors:
		A  				=				unmatched_donors[0]
		A  				=				donor_pref[donor]
		A  				=				donor_preference[num_donations[donor]]
		num_donations[donor] += 1
		A  				=				recipient_pref[recipient]
		A  				=				rec_record[recipient]

		if prev_donor != -1:
			if rec_preference.index(snake_case__       ) > rec_preference.index(snake_case__       ):
				A  				=				donor
				A  				=				recipient
				unmatched_donors.append(snake_case__       )
				unmatched_donors.remove(snake_case__       )
		else:
			A  				=				donor
			A  				=				recipient
			unmatched_donors.remove(snake_case__       )
	return donor_record