






from typing import Any
class     a    :



      """simple docstring"""


      def __init__(      self					:			int		,      __lowercase					:			Any					)							->      str:
        __UpperCAmelCase							:	Any           =  data
        __UpperCAmelCase							:	Union[str, Any]           =  None




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


class     a    :



      """simple docstring"""


      def __init__(      self					:			List[str]					)							->      Dict:
        __UpperCAmelCase							:	str           =  None
      def __iter__(      self					:			str					)							->      Any:
        __UpperCAmelCase							:	List[str]           =  self.head
        while node:
          yield node.data
          __UpperCAmelCase							:	Optional[Any]           =  node.next
      def __len__(      self					:			Union[str, Any]					)							->      int:
        return sum(1 for _ in self					)
      def __repr__(      self					:			Optional[Any]					)							->      str:
        return "->".join([str(__lowercase					) for item in self]					)
      def __getitem__(      self					:			Union[str, Any]		,      __lowercase					:			int					)							->      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					:			List[Any]		,      __lowercase					:			int		,      __lowercase					:			Any					)							->      None:
        if not 0 <= index < len(self					):
          raise ValueError("""list index out of range."""					)
        __UpperCAmelCase							:	str           =  self.head
        for _ in range(__lowercase					):
          __UpperCAmelCase							:	Optional[int]           =  current.next
        __UpperCAmelCase							:	str           =  data
      def 	UpperCAmelCase      (      self					:			Tuple		,      __lowercase					:			Any					)							->      None:
        self.insert_nth(len(self					)		,      __lowercase					)
      def 	UpperCAmelCase      (      self					:			Dict		,      __lowercase					:			Any					)							->      None:
        self.insert_nth(0		,      __lowercase					)
      def 	UpperCAmelCase      (      self					:			Any		,      __lowercase					:			int		,      __lowercase					:			Any					)							->      None:
        if not 0 <= index <= len(self					):
          raise IndexError("""list index out of range"""					)
        __UpperCAmelCase							:	int           =  Node(__lowercase					)
        if self.head is None:
          __UpperCAmelCase							:	Dict           =  new_node
        elif index == 0:
          __UpperCAmelCase							:	str           =  self.head  # link new_node to head
          __UpperCAmelCase							:	Union[str, Any]           =  new_node
        else:
          __UpperCAmelCase							:	Optional[int]           =  self.head
          for _ in range(index - 1					):
            __UpperCAmelCase							:	int           =  temp.next
          __UpperCAmelCase							:	List[Any]           =  temp.next
          __UpperCAmelCase							:	Union[str, Any]           =  new_node
      def 	UpperCAmelCase      (      self					:			str					)							->      None:  # print every node data
        print(self					)
      def 	UpperCAmelCase      (      self					:			Optional[int]					)							->      Any:
        return self.delete_nth(0					)
      def 	UpperCAmelCase      (      self					:			Optional[Any]					)							->      Any:  # delete from tail
        return self.delete_nth(len(self					) - 1					)
      def 	UpperCAmelCase      (      self					:			Union[str, Any]		,      __lowercase					:			int = 0					)							->      Any:
        if not 0 <= index <= len(self					) - 1:  # test if index is valid
          raise IndexError("""List index out of range."""					)
        __UpperCAmelCase							:	Any           =  self.head  # default first node
        if index == 0:
          __UpperCAmelCase							:	Tuple           =  self.head.next
        else:
          __UpperCAmelCase							:	Optional[int]           =  self.head
          for _ in range(index - 1					):
            __UpperCAmelCase							:	Optional[int]           =  temp.next
          __UpperCAmelCase							:	Optional[Any]           =  temp.next
          __UpperCAmelCase							:	Dict           =  temp.next.next
        return delete_node.data
      def 	UpperCAmelCase      (      self					:			List[str]					)							->      bool:
        return self.head is None




      def 	UpperCAmelCase      (      self					:			List[str]					)							->      None:
        __UpperCAmelCase							:	Dict           =  None
        __UpperCAmelCase							:	List[Any]           =  self.head

        while current:
          # Store the current node's next node.
          __UpperCAmelCase							:	Any           =  current.next
          # Make the current node's next point backwards
          __UpperCAmelCase							:	Dict           =  prev
          # Make the previous node be the current node
          __UpperCAmelCase							:	Dict           =  current
          # Make the current node the next node (to progress iteration)
          __UpperCAmelCase							:	int           =  next_node
        # Return prev in order to put the head at the end
        __UpperCAmelCase							:	Union[str, Any]           =  prev






def 				lowerCamelCase__      (    ):
  __UpperCAmelCase							:	Any           =  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		):
    __UpperCAmelCase							:	Dict           =  -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 				lowerCamelCase__      (    ):
  __UpperCAmelCase							:	Union[str, Any]           =  [
      -9,
      100,
      Node(77345112		),
      """dlrow olleH""",
      7,
      5555,
      0,
      -1_9_2.5_5_5_5_5,
      """Hello, world!""",
      7_7.9,
      Node(10		),
      None,
      None,
      1_2.2_0,
  ]
  __UpperCAmelCase							:	Dict           =  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
  __UpperCAmelCase							:	str           =  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
  __UpperCAmelCase							:	Optional[int]           =  linked_list.delete_tail()
  assert result == 1_2.2
  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
  __UpperCAmelCase							:	List[Any]           =  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 				lowerCamelCase__      (    ):
  from doctest import testmod

  testmod()

  __UpperCAmelCase							:	Tuple           =  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]}"""		)
  __UpperCAmelCase							:	str           =  input("""Enter New Value: """		).strip()
  print("""New list:"""		)
  print(__lowerCamelCase		)
  print(f"""length of linked_list is : {len(__lowerCamelCase		)}"""		)


if __name__ == "__main__":
       main()










# Copyright 2023 The HuggingFace Team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available


a		:       Union[str, Any]			     = {"configuration_timm_backbone": ["TimmBackboneConfig"]}


try:
       if not is_torch_available():
              raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
       pass
else:
       a		:       Tuple			     = ["TimmBackbone"]


if TYPE_CHECKING:
       from .configuration_timm_backbone import TimmBackboneConfig

       try:
              if not is_torch_available():
                     raise OptionalDependencyNotAvailable()
       except OptionalDependencyNotAvailable:
              pass
       else:
              from .modeling_timm_backbone import TimmBackbone

else:
       import sys

       a		:       List[Any]			     = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)


