




from __future__ import annotations

from typing import Any




class 			UpperCAmelCase_      (   A       ):




							'''simple docstring'''



							pass





class 			UpperCAmelCase_      :




							'''simple docstring'''



							def __init__(					self       :	int       ,     a       :	Any			)			->					None:
										SCREAMING_SNAKE_CASE           =					data
										SCREAMING_SNAKE_CASE           =					None





							def __iter__(					self       :	Optional[Any]			)			->					Union[str, Any]:
										SCREAMING_SNAKE_CASE           =					self
										SCREAMING_SNAKE_CASE           =					[]
										while node:
													if node in visited:
																raise ContainsLoopError
													visited.append(a			)
													yield node.data
													SCREAMING_SNAKE_CASE           =					node.next_node







							@property
							def    _UpperCAmelCase     (					self       :	str			)			->					bool:
										try:
													list(self			)
													return False
										except ContainsLoopError:
													return True


if __name__ == "__main__":
		__A						:							str							=  Node(1)
		__A						:							Optional[int]							=  Node(2)
		__A						:							str							=  Node(3)
		__A						:							Union[str, Any]							=  Node(4)
		print(root_node.has_loop)  # False
		__A						:							Union[str, Any]							=  root_node.next_node
		print(root_node.has_loop)  # True

		__A						:							str							=  Node(5)
		__A						:							List[str]							=  Node(6)
		__A						:							Tuple							=  Node(5)
		__A						:							Union[str, Any]							=  Node(6)
		print(root_node.has_loop)  # False

		__A						:							List[Any]							=  Node(1)
		print(root_node.has_loop)  # False









from __future__ import annotations
def 					lowerCamelCase_    (    SCREAMING_SNAKE_CASE   ):
			'''simple docstring'''
			create_state_space_tree(SCREAMING_SNAKE_CASE					,	[]					,	0					,	[0 for i in range(len(SCREAMING_SNAKE_CASE   )   )]   )
def 					lowerCamelCase_    (    SCREAMING_SNAKE_CASE					,	SCREAMING_SNAKE_CASE					,	SCREAMING_SNAKE_CASE					,	SCREAMING_SNAKE_CASE					,	):
			'''simple docstring'''

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

			for i in range(len(SCREAMING_SNAKE_CASE   )   ):
						if not index_used[i]:
									current_sequence.append(sequence[i]   )
									SCREAMING_SNAKE_CASE           =					True
									create_state_space_tree(SCREAMING_SNAKE_CASE					,	SCREAMING_SNAKE_CASE					,	index + 1					,	SCREAMING_SNAKE_CASE   )
									current_sequence.pop()
									SCREAMING_SNAKE_CASE           =					False
__A						:							list[int | str]							=  [3, 1, 2, 4]
generate_all_permutations(sequence)

__A						:							list[int | str]							=  ["A", "B", "C"]




generate_all_permutations(sequence_a)






