
from typing import Any




class   UpperCAmelCase_					:






						'''simple docstring'''






						def __init__( self   ,       _lowercase				):

												"""simple docstring"""



												_lowerCAmelCase  						=			data
												_lowerCAmelCase  						=			None




						def __repr__( self				):

												"""simple docstring"""



												return F'Node({self.data})'






class   UpperCAmelCase_					:






						'''simple docstring'''






						def __init__( self				):

												"""simple docstring"""



												_lowerCAmelCase  						=			None




						def __iter__( self				):

												"""simple docstring"""



												_lowerCAmelCase  						=			self.head
												while node:
																		yield node.data
																		_lowerCAmelCase  						=			node.next




						def __len__( self				):

												"""simple docstring"""



												return sum(1 for _ in self				)




						def __repr__( self				):

												"""simple docstring"""



												return "->".join([str(_SCREAMING_SNAKE_CASE				) for item in self]				)




						def __getitem__( self   ,       _lowercase				):

												"""simple docstring"""



												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   ,       _lowercase   ,       _lowercase				):

												"""simple docstring"""



												if not 0 <= index < len(self				):
																		raise ValueError("""list index out of range."""				)
												_lowerCAmelCase  						=			self.head
												for _ in range(_SCREAMING_SNAKE_CASE				):
																		_lowerCAmelCase  						=			current.next
												_lowerCAmelCase  						=			data




						def  _lowercase     ( self   ,       _lowercase				):

												"""simple docstring"""



												self.insert_nth(len(self				)   ,       _SCREAMING_SNAKE_CASE				)




						def  _lowercase     ( self   ,       _lowercase				):

												"""simple docstring"""



												self.insert_nth(0   ,       _SCREAMING_SNAKE_CASE				)




						def  _lowercase     ( self   ,       _lowercase   ,       _lowercase				):

												"""simple docstring"""



												if not 0 <= index <= len(self				):
																		raise IndexError("""list index out of range"""				)
												_lowerCAmelCase  						=			Node(_SCREAMING_SNAKE_CASE				)
												if self.head is None:
																		_lowerCAmelCase  						=			new_node
												elif index == 0:
																		_lowerCAmelCase  						=			self.head  # link new_node to head
																		_lowerCAmelCase  						=			new_node
												else:
																		_lowerCAmelCase  						=			self.head
																		for _ in range(index - 1				):
																								_lowerCAmelCase  						=			temp.next
																		_lowerCAmelCase  						=			temp.next
																		_lowerCAmelCase  						=			new_node




						def  _lowercase     ( self				):  # print every node data

												"""simple docstring"""



												print(self				)




						def  _lowercase     ( self				):

												"""simple docstring"""



												return self.delete_nth(0				)




						def  _lowercase     ( self				):  # delete from tail

												"""simple docstring"""



												return self.delete_nth(len(self				) - 1				)




						def  _lowercase     ( self   ,       _lowercase = 0				):

												"""simple docstring"""



												if not 0 <= index <= len(self				) - 1:  # test if index is valid
																		raise IndexError("""List index out of range."""				)
												_lowerCAmelCase  						=			self.head  # default first node
												if index == 0:
																		_lowerCAmelCase  						=			self.head.next
												else:
																		_lowerCAmelCase  						=			self.head
																		for _ in range(index - 1				):
																								_lowerCAmelCase  						=			temp.next
																		_lowerCAmelCase  						=			temp.next
																		_lowerCAmelCase  						=			temp.next.next
												return delete_node.data




						def  _lowercase     ( self				):

												"""simple docstring"""



												return self.head is None




						def  _lowercase     ( self				):

												"""simple docstring"""



												_lowerCAmelCase  						=			None
												_lowerCAmelCase  						=			self.head

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






def A				():
						_lowerCAmelCase  						=			LinkedList()
						assert linked_list.is_empty() is True
						assert str(__lowerCamelCase		) == ""

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

						linked_list.insert_head(0		)
						linked_list.insert_tail(11		)
						assert str(__lowerCamelCase		) == "->".join(str(__lowerCamelCase		) 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(__lowerCamelCase		) == 9
						assert str(__lowerCamelCase		) == "->".join(str(__lowerCamelCase		) 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		):
												_lowerCAmelCase  						=			-i
						assert all(linked_list[i] == -i for i in range(0			,     9		)		) is True

						linked_list.reverse()
						assert str(__lowerCamelCase		) == "->".join(str(__lowerCamelCase		) for i in range(-8			,     1		)		)


def A				():
						_lowerCAmelCase  						=			[
						    -9,
						    100,
						    Node(77345112		),
						    """dlrow olleH""",
						    7,
						    5555,
						    0,
						    -192.55_555,
						    """Hello, world!""",
						    77.9,
						    Node(10		),
						    None,
						    None,
						    12.20,
						]
						_lowerCAmelCase  						=			LinkedList()

						for i in test_input:
												linked_list.insert_tail(__lowerCamelCase		)

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

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

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


def A				():
						from doctest import testmod

						testmod()

						_lowerCAmelCase  						=			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(__lowerCamelCase		)
						print("""\nReading/changing Node data using indexing:"""		)
						print(f'Element at Position 1: {linked_list[1]}'		)
						_lowerCAmelCase  						=			input("""Enter New Value: """		).strip()
						print("""New list:"""		)
						print(__lowerCamelCase		)
						print(f'length of linked_list is : {len(__lowerCamelCase		)}'		)


if __name__ == "__main__":
						main()


'''simple docstring'''



from ...configuration_utils import PretrainedConfig




class   UpperCAmelCase_					(		_SCREAMING_SNAKE_CASE			):






						'''simple docstring'''






						_lowercase		:				Tuple									=       '''bert-generation'''




						def __init__( self   ,       _lowercase=50_358   ,       _lowercase=1_024   ,       _lowercase=24   ,       _lowercase=16   ,       _lowercase=4_096   ,       _lowercase="gelu"   ,       _lowercase=0.1   ,       _lowercase=0.1   ,       _lowercase=512   ,       _lowercase=0.02   ,       _lowercase=1e-12   ,       _lowercase=0   ,       _lowercase=2   ,       _lowercase=1   ,       _lowercase="absolute"   ,       _lowercase=True   ,       **_lowercase   ,       ):

												"""simple docstring"""



												super().__init__(pad_token_id=_lowercase   ,       bos_token_id=_lowercase   ,       eos_token_id=_lowercase   ,       **_lowercase				)

												_lowerCAmelCase  						=			vocab_size
												_lowerCAmelCase  						=			hidden_size
												_lowerCAmelCase  						=			num_hidden_layers
												_lowerCAmelCase  						=			num_attention_heads
												_lowerCAmelCase  						=			hidden_act
												_lowerCAmelCase  						=			intermediate_size
												_lowerCAmelCase  						=			hidden_dropout_prob
												_lowerCAmelCase  						=			attention_probs_dropout_prob
												_lowerCAmelCase  						=			max_position_embeddings
												_lowerCAmelCase  						=			initializer_range
												_lowerCAmelCase  						=			layer_norm_eps
												_lowerCAmelCase  						=			position_embedding_type
												_lowerCAmelCase  						=			use_cache
