


"""simple docstring"""
__SCREAMING_SNAKE_CASE							:      str						=      {'a': ['c', 'b'], 'b': ['d', 'e'], 'c': [], 'd': [], 'e': []}
__SCREAMING_SNAKE_CASE							:      int						=      ['a', 'b', 'c', 'd', 'e']







def   _a			( _SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			)      ->			int:
							snake_case_          =						start
							# add current to visited
							visited.append(_SCREAMING_SNAKE_CASE			)
							snake_case_          =						edges[current]
							for neighbor in neighbors:
														# if neighbor not in visited, visit
														if neighbor not in visited:
																					snake_case_          =						topological_sort(_SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			)
    # if all neighbors visited add current to sort
							sort.append(_SCREAMING_SNAKE_CASE			)
							# if all vertices haven't been visited select a new one to visit
							if len(_SCREAMING_SNAKE_CASE			) != len(_SCREAMING_SNAKE_CASE			):
														for vertice in vertices:
																					if vertice not in visited:
																												snake_case_          =						topological_sort(_SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE			)
    # return sort
							return sort


if __name__ == "__main__":
				__SCREAMING_SNAKE_CASE							:      Optional[int]						=      topological_sort('a', [], [])
				print(sort)







"""simple docstring"""
def   _a			( _SCREAMING_SNAKE_CASE			,	_SCREAMING_SNAKE_CASE = 0			)      ->			list:
							snake_case_          =						length or len(_SCREAMING_SNAKE_CASE			)
							snake_case_          =						False
							for i in range(length - 1			):
														if list_data[i] > list_data[i + 1]:
																					snake_case_    ,  snake_case_          =						list_data[i + 1], list_data[i]
																					snake_case_          =						True

							return list_data if not swapped else bubble_sort(_SCREAMING_SNAKE_CASE			,	length - 1			)


if __name__ == "__main__":
				import doctest

				doctest.testmod()



