






from typing import Any


class 	__SCREAMING_SNAKE_CASE:
							def __init__(  self:   Optional[int]							,						UpperCamelCase:   Optional[int]    )		->		Any:
											snake_case__						=  data
											snake_case__						=  None


							def __repr__(  self:   List[Any]    )		->		str:
											return F'''Node({self.data})'''


class 	__SCREAMING_SNAKE_CASE:
							def __init__(  self:   Tuple    )		->		Optional[Any]:
											snake_case__						=  None
							def __iter__(  self:   Tuple    )		->		Any:
											snake_case__						=  self.head
											while node:
															yield node.data
															snake_case__						=  node.next
							def __len__(  self:   Optional[Any]    )		->		int:
											return sum(1 for _ in self    )
							def __repr__(  self:   Optional[int]    )		->		str:
											return "->".join([str(UpperCamelCase__    ) for item in self]    )
							def __getitem__(  self:   List[str]							,						UpperCamelCase:   List[Any]    )		->		Any:




											if not 0 <= index < len(self    ):
															raise ValueError('list index out of range.'    )
											for i, node in enumerate(self    ):
															if i == index:
																			return node
											return None
							def __setitem__(  self:   int							,						UpperCamelCase:   Dict							,						UpperCamelCase:   List[Any]    )		->		None:




											if not 0 <= index < len(self    ):
															raise ValueError('list index out of range.'    )
											snake_case__						=  self.head
											for _ in range(UpperCamelCase__    ):
															snake_case__						=  current.next
											snake_case__						=  data
							def lowerCAmelCase_			(  self:   str							,						UpperCamelCase:   Tuple    )		->		None:
											self.insert_nth(len(self    )							,						UpperCamelCase__    )
							def lowerCAmelCase_			(  self:   Tuple							,						UpperCamelCase:   Optional[Any]    )		->		None:
											self.insert_nth(0							,						UpperCamelCase__    )
							def lowerCAmelCase_			(  self:   List[str]							,						UpperCamelCase:   Dict							,						UpperCamelCase:   Tuple    )		->		None:




											if not 0 <= index <= len(self    ):
															raise IndexError('list index out of range'    )
											snake_case__						=  Node(UpperCamelCase__    )
											if self.head is None:
															snake_case__						=  new_node
											elif index == 0:
															snake_case__						=  self.head  # link new_node to head
															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
							def lowerCAmelCase_			(  self:   List[Any]    )		->		None:  # print every node data
											print(self    )
							def lowerCAmelCase_			(  self:   List[Any]    )		->		Any:
											return self.delete_nth(0    )
							def lowerCAmelCase_			(  self:   Any    )		->		Any:  # delete from tail
											return self.delete_nth(len(self    ) - 1    )
							def lowerCAmelCase_			(  self:   Optional[Any]							,						UpperCamelCase:   int = 0    )		->		Any:




											if not 0 <= index <= len(self    ) - 1:  # test if index is valid
															raise IndexError('List index out of range.'    )
											snake_case__						=  self.head  # default first node
											if index == 0:
															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
											return delete_node.data
							def lowerCAmelCase_			(  self:   List[Any]    )		->		bool:
											return self.head is None


							def lowerCAmelCase_			(  self:   str    )		->		None:
											snake_case__						=  None
											snake_case__						=  self.head

											while current:
															# Store the current node's next node.
															snake_case__						=  current.next
															# Make the current node's next point backwards
															snake_case__						=  prev
															# Make the previous node be the current node
															snake_case__						=  current
															# Make the current node the next node (to progress iteration)
															snake_case__						=  next_node
											# Return prev in order to put the head at the end
											snake_case__						=  prev


def   a_			(   )      ->      None:







				"""simple docstring"""
				snake_case__						=  LinkedList()
				assert linked_list.is_empty() is True
				assert str(_A	) == ""

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

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

				for i in range(10	):
								assert len(_A	) == i
								linked_list.insert_nth(_A   , i + 1	)
				assert str(_A	) == "->".join(str(_A	) for i in range(1   , 11	)	)

				linked_list.insert_head(0	)
				linked_list.insert_tail(11	)
				assert str(_A	) == "->".join(str(_A	) for i in range(0   , 12	)	)

				assert linked_list.delete_head() == 0
				assert linked_list.delete_nth(9	) == 10
				assert linked_list.delete_tail() == 11
				assert len(_A	) == 9
				assert str(_A	) == "->".join(str(_A	) for i in range(1   , 10	)	)

				assert all(linked_list[i] == i + 1 for i in range(0   , 9	)	) is True

				for i in range(0   , 9	):
								snake_case__						=  -i
				assert all(linked_list[i] == -i for i in range(0   , 9	)	) is True

				linked_list.reverse()
				assert str(_A	) == "->".join(str(_A	) for i in range(-8   , 1	)	)
def   a_			(   )      ->      None:







				"""simple docstring"""
				snake_case__						=  [
				    -9,
				    100,
				    Node(77345112	),
				    "dlrow olleH",
				    7,
				    5555,
				    0,
				    -192.55555,
				    "Hello, world!",
				    77.9,
				    Node(10	),
				    None,
				    None,
				    12.20,
				]
				snake_case__						=  LinkedList()

				for i in test_input:
								linked_list.insert_tail(_A	)

				# Check if it's empty or not
				assert linked_list.is_empty() is False
				assert (
				    str(_A	) == "-9->100->Node(77345112)->dlrow olleH->7->5555->0->"
				    "-192.55555->Hello, world!->77.9->Node(10)->None->None->12.2"
				)

				# Delete the head
				snake_case__						=  linked_list.delete_head()
				assert result == -9
				assert (
				    str(_A	) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
				    "Hello, world!->77.9->Node(10)->None->None->12.2"
				)

				# Delete the tail
				snake_case__						=  linked_list.delete_tail()
				assert result == 12.2
				assert (
				    str(_A	) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
				    "Hello, world!->77.9->Node(10)->None->None"
				)

				# Delete a node in specific location in linked list
				snake_case__						=  linked_list.delete_nth(10	)
				assert result is None
				assert (
				    str(_A	) == "100->Node(77345112)->dlrow olleH->7->5555->0->-192.55555->"
				    "Hello, world!->77.9->Node(10)->None"
				)

				# Add a Node instance to its head
				linked_list.insert_head(Node('Hello again, world!'	)	)
				assert (
				    str(_A	)
				    == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
				    "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None"
				)

				# Add None to its tail
				linked_list.insert_tail(_A	)
				assert (
				    str(_A	)
				    == "Node(Hello again, world!)->100->Node(77345112)->dlrow olleH->"
				    "7->5555->0->-192.55555->Hello, world!->77.9->Node(10)->None->None"
				)

				# Reverse the linked list
				linked_list.reverse()
				assert (
				    str(_A	)
				    == "None->None->Node(10)->77.9->Hello, world!->-192.55555->0->5555->"
				    "7->dlrow olleH->Node(77345112)->100->Node(Hello again, world!)"
				)
def   a_			(   )      ->      List[str]:







				"""simple docstring"""
				from doctest import testmod

				testmod()

				snake_case__						=  LinkedList()
				linked_list.insert_head(input('Inserting 1st at head '	).strip()	)
				linked_list.insert_head(input('Inserting 2nd at head '	).strip()	)
				print('\nPrint list:'	)
				linked_list.print_list()
				linked_list.insert_tail(input('\nInserting 1st at tail '	).strip()	)
				linked_list.insert_tail(input('Inserting 2nd at tail '	).strip()	)
				print('\nPrint list:'	)
				linked_list.print_list()
				print('\nDelete head'	)
				linked_list.delete_head()
				print('Delete tail'	)
				linked_list.delete_tail()
				print('\nPrint list:'	)
				linked_list.print_list()
				print('\nReverse linked list'	)
				linked_list.reverse()
				print('\nPrint list:'	)
				linked_list.print_list()
				print('\nString representation of linked list:'	)
				print(_A	)
				print('\nReading/changing Node data using indexing:'	)
				print(f'''Element at Position 1: {linked_list[1]}'''	)
				snake_case__						=  input('Enter New Value: '	).strip()
				print('New list:'	)
				print(_A	)
				print(f'''length of linked_list is : {len(_A	)}'''	)


if __name__ == "__main__":
							main()








"""simple docstring"""



from .imports import is_tqdm_available


if is_tqdm_available():
  from tqdm.auto import tqdm as _tqdm

from ..state import PartialState







def     __lowerCAmelCase		(		lowercase    :    bool = True		,				*lowercase    :    str		,				**lowercase    :    List[Any]					)      ->		List[Any]:


    """simple docstring"""





    if not is_tqdm_available():
        raise ImportError("Accelerate's `tqdm` module requires `tqdm` to be installed. Please run `pip install tqdm`."					)
    snake_case       : Dict    =       False
    if main_process_only:
        snake_case       : int    =       PartialState().local_process_index == 0
    return _tqdm(*lowercase		,				**lowercase		,				disable=lowercase					)





