

from __future__ import annotations

from collections.abc import Iterator
from typing import Any





class 	snake_case_   :







			'''simple docstring'''

			def __init__(     self :				Any							,   _UpperCamelCase :				Any							)      ->List[Any]:
									snake_case_   =	data
									snake_case_   =	None






class 	snake_case_   :







			'''simple docstring'''

			def __init__(     self :				Optional[Any]							)      ->List[str]:
									snake_case_   =	None
									snake_case_   =	None







			def __iter__(     self :				Union[str, Any]							)      ->Iterator[Any]:
									snake_case_   =	self.head
									while self.head:
															yield node.data
															snake_case_   =	node.next
															if node == self.head:
																					break







			def __len__(     self :				Optional[int]							)      ->int:
									return sum(1 for _ in self							)







			def __repr__(     self :				Any							)      ->Union[str, Any]:
									return "->".join(str(_UpperCamelCase							) for item in iter(self							)							)







			def 				snake_case__(     self :				Tuple							,   _UpperCamelCase :				Any							)      ->None:
									self.insert_nth(len(self							)							,   _UpperCamelCase							)







			def 				snake_case__(     self :				Optional[Any]							,   _UpperCamelCase :				Any							)      ->None:
									self.insert_nth(0							,   _UpperCamelCase							)







			def 				snake_case__(     self :				Any							,   _UpperCamelCase :				int							,   _UpperCamelCase :				Any							)      ->None:
									if index < 0 or index > len(self							):
															raise IndexError('''list index out of range.'''							)
									snake_case_   =	Node(_UpperCamelCase							)
									if self.head is None:
															snake_case_   =	new_node  # first node points itself
															snake_case_   =	snake_case_   =	new_node
									elif index == 0:  # insert at head
															snake_case_   =	self.head
															snake_case_   =	snake_case_   =	new_node
									else:
															snake_case_   =	self.head
															for _ in range(index - 1							):
																					snake_case_   =	temp.next
															snake_case_   =	temp.next
															snake_case_   =	new_node
															if index == len(self							) - 1:  # insert at tail
																					snake_case_   =	new_node







			def 				snake_case__(     self :				Optional[int]							)      ->Union[str, Any]:
									return self.delete_nth(0							)







			def 				snake_case__(     self :				str							)      ->Any:
									return self.delete_nth(len(self							) - 1							)







			def 				snake_case__(     self :				List[Any]							,   _UpperCamelCase :				int = 0							)      ->Any:
									if not 0 <= index < len(self							):
															raise IndexError('''list index out of range.'''							)
									snake_case_   =	self.head
									if self.head == self.tail:  # just one node
															snake_case_   =	snake_case_   =	None
									elif index == 0:  # delete head node
															snake_case_   =	self.tail.next.next
															snake_case_   =	self.head.next
									else:
															snake_case_   =	self.head
															for _ in range(index - 1							):
																					snake_case_   =	temp.next
															snake_case_   =	temp.next
															snake_case_   =	temp.next.next
															if index == len(self							) - 1:  # delete at tail
																					snake_case_   =	temp
									return delete_node.data







			def 				snake_case__(     self :				Tuple							)      ->bool:
									return len(self							) == 0






def   __SCREAMING_SNAKE_CASE					():
						snake_case_   =	CircularLinkedList()
						assert len(SCREAMING_SNAKE_CASE__       ) == 0
						assert circular_linked_list.is_empty() is True
						assert str(SCREAMING_SNAKE_CASE__       ) == ""

						try:
												circular_linked_list.delete_front()
												raise AssertionError  # This should not happen
						except IndexError:
												assert True  # This should happen

						try:
												circular_linked_list.delete_tail()
												raise AssertionError  # This should not happen
						except IndexError:
												assert True  # This should happen

						try:
												circular_linked_list.delete_nth(-1       )
												raise AssertionError
						except IndexError:
												assert True

						try:
												circular_linked_list.delete_nth(0       )
												raise AssertionError
						except IndexError:
												assert True

						assert circular_linked_list.is_empty() is True
						for i in range(5       ):
												assert len(SCREAMING_SNAKE_CASE__       ) == i
												circular_linked_list.insert_nth(SCREAMING_SNAKE_CASE__  ,		i + 1       )
						assert str(SCREAMING_SNAKE_CASE__       ) == "->".join(str(SCREAMING_SNAKE_CASE__       ) for i in range(1  ,		6       )       )

						circular_linked_list.insert_tail(6       )
						assert str(SCREAMING_SNAKE_CASE__       ) == "->".join(str(SCREAMING_SNAKE_CASE__       ) for i in range(1  ,		7       )       )
						circular_linked_list.insert_head(0       )
						assert str(SCREAMING_SNAKE_CASE__       ) == "->".join(str(SCREAMING_SNAKE_CASE__       ) for i in range(0  ,		7       )       )

						assert circular_linked_list.delete_front() == 0
						assert circular_linked_list.delete_tail() == 6
						assert str(SCREAMING_SNAKE_CASE__       ) == "->".join(str(SCREAMING_SNAKE_CASE__       ) for i in range(1  ,		6       )       )
						assert circular_linked_list.delete_nth(2       ) == 3

						circular_linked_list.insert_nth(2  ,		3       )
						assert str(SCREAMING_SNAKE_CASE__       ) == "->".join(str(SCREAMING_SNAKE_CASE__       ) for i in range(1  ,		6       )       )

						assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
					import doctest

					doctest.testmod()


from __future__ import annotations

from math import pi, sqrt


def   __SCREAMING_SNAKE_CASE					(SCREAMING_SNAKE_CASE__  ,		SCREAMING_SNAKE_CASE__       ):

						if inductance <= 0:
												raise ValueError('''Inductance cannot be 0 or negative'''       )

						elif capacitance <= 0:
												raise ValueError('''Capacitance cannot be 0 or negative'''       )

						else:
												return (
												    "Resonant frequency",
												    float(1 / (2 * pi * (sqrt(inductance * capacitance       )))       ),
												)


if __name__ == "__main__":
					import doctest

					doctest.testmod()