


'''simple docstring'''



from __future__ import annotations

from typing import Any






def   lowerCamelCase							(_SCREAMING_SNAKE_CASE				:       list[Any]       ):
					create_state_space_tree(_SCREAMING_SNAKE_CASE						,				[]						,				0       )






def   lowerCamelCase							(_SCREAMING_SNAKE_CASE				:       list[Any]						,				_SCREAMING_SNAKE_CASE				:       list[Any]						,				_SCREAMING_SNAKE_CASE				:       int       ):

					if index == len(_SCREAMING_SNAKE_CASE       ):
										print(_SCREAMING_SNAKE_CASE       )
										return

					create_state_space_tree(_SCREAMING_SNAKE_CASE						,				_SCREAMING_SNAKE_CASE						,				index + 1       )
					current_subsequence.append(sequence[index]       )
					create_state_space_tree(_SCREAMING_SNAKE_CASE						,				_SCREAMING_SNAKE_CASE						,				index + 1       )
					current_subsequence.pop()


if __name__ == "__main__":
	__lowercase     :						list[Any]	=     [3, 1, 2, 4]
	generate_all_subsequences(seq)

	seq.clear()
	seq.extend(['A', 'B', 'C'])
	generate_all_subsequences(seq)







'''simple docstring'''



__lowercase     :						Optional[Any]	=     {'a': ['c', 'b'], 'b': ['d', 'e'], 'c': [], 'd': [], 'e': []}
__lowercase     :						List[str]	=     ['a', 'b', 'c', 'd', 'e']






def   lowerCamelCase							(_SCREAMING_SNAKE_CASE				:       List[Any]						,				_SCREAMING_SNAKE_CASE				:       Any						,				_SCREAMING_SNAKE_CASE				:       List[str]       ):
					__a      :	Any    =  start
					# add current to visited
					visited.append(_SCREAMING_SNAKE_CASE       )
					__a      :	Union[str, Any]    =  edges[current]
					for neighbor in neighbors:
										# if neighbor not in visited, visit
										if neighbor not in visited:
															__a      :	Dict    =  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:
																				__a      :	List[Any]    =  topological_sort(_SCREAMING_SNAKE_CASE						,				_SCREAMING_SNAKE_CASE						,				_SCREAMING_SNAKE_CASE       )
    # return sort
					return sort


if __name__ == "__main__":
	__lowercase     :						Union[str, Any]	=     topological_sort('a', [], [])
	print(sort)



