

from __future__ import annotations

from dataclasses import dataclass

@dataclass
class 			a					:
						_lowercase        =     42
						_lowercase        =     None
						_lowercase        =     None







def 							__SCREAMING_SNAKE_CASE							(			lowerCAmelCase:					TreeNode | None	)				->    bool:

				# Validation
				def is_valid_tree(lowerCAmelCase:					TreeNode | None	) -> bool:
								if node is None:
												return True

								if not isinstance(lowerCAmelCase					, lowerCAmelCase	):
												return False

								try:
												float(node.data	)
								except (TypeError, ValueError):
												return False

								return is_valid_tree(node.left	) and is_valid_tree(node.right	)

				if not is_valid_tree(lowerCAmelCase	):
								raise ValueError(
								    "Each node should be type of TreeNode and data should be float."	)

				def is_binary_search_tree_recursive_check(
				    lowerCAmelCase:					TreeNode | None					, lowerCAmelCase:					float					, lowerCAmelCase:					float	) -> bool:

								if node is None:
												return True

								return (
								    left_bound < node.data < right_bound
								    and is_binary_search_tree_recursive_check(node.left					, lowerCAmelCase					, node.data	)
								    and is_binary_search_tree_recursive_check(
								        node.right					, node.data					, lowerCAmelCase	)
								)

				return is_binary_search_tree_recursive_check(lowerCAmelCase					, -float("inf"	)					, float("inf"	)	)


if __name__ == "__main__":
					import doctest

					doctest.testmod()





from typing import Any

class 			a					:


						def __init__(    self  ,   A_		):







										'''simple docstring'''


										_UpperCAmelCase    :						List[Any]							=      data
										_UpperCAmelCase    :						Any							=      None







class 			a					:


						def __init__(    self		):







										'''simple docstring'''


										_UpperCAmelCase    :						Union[str, Any]							=      None


						def     _UpperCAmelCase			(    self		):







										'''simple docstring'''


										_UpperCAmelCase    :						str							=      self.head
										while temp is not None:
														print(temp.data  ,   end=" "		)
														_UpperCAmelCase    :						str							=      temp.next
										print()


						def     _UpperCAmelCase			(    self  ,   A_		):







										'''simple docstring'''


										_UpperCAmelCase    :						Optional[int]							=      Node(A_		)
										_UpperCAmelCase    :						Tuple							=      self.head
										_UpperCAmelCase    :						Tuple							=      new_node





						def     _UpperCAmelCase			(    self  ,   A_  ,   A_		):







										'''simple docstring'''


										if node_data_a == node_data_a:
														return
										else:
														_UpperCAmelCase    :						int							=      self.head
														while node_a is not None and node_a.data != node_data_a:
																		_UpperCAmelCase    :						Tuple							=      node_a.next

														_UpperCAmelCase    :						Dict							=      self.head
														while node_a is not None and node_a.data != node_data_a:
																		_UpperCAmelCase    :						List[Any]							=      node_a.next

														if node_a is None or node_a is None:
																		return

														_UpperCAmelCase						,							_UpperCAmelCase    :						Optional[int]							=      node_a.data, node_a.data


if __name__ == "__main__":
					SCREAMING_SNAKE_CASE_            = LinkedList()
					for i in range(5, 0, -1):
										ll.push(i)

					ll.print_list()

					ll.swap_nodes(1, 4)
					print('After swapping')
					ll.print_list()


