
from __future__ import annotations

from typing import Any







class      A__							(     __a	):
				pass







class      A__							:






				def __init__(						self					:      List[Any]    ,     a					:      Any   ):






							'''simple docstring'''







							lowerCAmelCase__      :      Any         =		data
							lowerCAmelCase__      :      Node | None         =		None






				def __iter__(						self					:      Tuple   ):






							'''simple docstring'''







							lowerCAmelCase__      :      Union[str, Any]         =		self
							lowerCAmelCase__      :      List[str]         =		[]
							while node:
										if node in visited:
													raise ContainsLoopError
										visited.append(__a   )
										yield node.data
										lowerCAmelCase__      :      Any         =		node.next_node






				@property
				def 							_lowerCamelCase		(						self					:      int   ):






							'''simple docstring'''







							try:
										list(self   )
										return False
							except ContainsLoopError:
										return True


if __name__ == "__main__":
					lowerCamelCase__          =		Node(1)
					lowerCamelCase__          =		Node(2)
					lowerCamelCase__          =		Node(3)
					lowerCamelCase__          =		Node(4)
					print(root_node.has_loop)  # False
					lowerCamelCase__          =		root_node.next_node
					print(root_node.has_loop)  # True

					lowerCamelCase__          =		Node(5)
					lowerCamelCase__          =		Node(6)
					lowerCamelCase__          =		Node(5)
					lowerCamelCase__          =		Node(6)
					print(root_node.has_loop)  # False

					lowerCamelCase__          =		Node(1)
					print(root_node.has_loop)  # False







from math import pi
def 					snake_case_						(   lowerCAmelCase_				:  int				,				lowerCAmelCase_				:  int					):
							return 2 * pi * radius * (angle / 360)


if __name__ == "__main__":
	print(arc_length(90, 10))