code: from __future__ import annotations
  
  from typing import Any
  
  
  
  
  
  
  
  class 					UpperCAmelCase_				:
  
  
  
  
      def __init__(					self  :   Tuple      ,      lowerCAmelCase  :   Any      ,      lowerCAmelCase  :   Any   )	-> None:  # noqa: A002
        a__     		=     item
        a__     		=     next
  
  
  
  
  
  
  
  class 					UpperCAmelCase_				:
  
  
  
  
      def __init__(					self  :   Union[str, Any]   )	-> None:
        a__     		=     None
        a__     		=     0
  
  
  
  
      def 						__lowerCamelCase (					self  :   Union[str, Any]      ,      lowerCAmelCase  :   Any   )	-> None:
        a__     		=     Node(lowerCAmelCase      ,      self.head   )
        self.size += 1
  
  
  
  
      def 						__lowerCamelCase (					self  :   int   )	-> Any:
        # Switched 'self.is_empty()' to 'self.head is None'
        # because mypy was considering the possibility that 'self.head'
        # can be None in below else part and giving error
        if self.head is None:
          return None
        else:
          a__     		=     self.head.item
          a__     		=     self.head.next
          self.size -= 1
          return item
  
  
  
  
      def 						__lowerCamelCase (					self  :   str   )	-> bool:
        return self.head is None
  
  
  
  
      def __str__(					self  :   Union[str, Any]   )	-> str:
        if self.is_empty():
          return ""
        else:
          a__     		=     self.head
          a__     		=     ""
          a__     		=     []
          while iterate:
            item_list.append(str(iterate.item   )   )
            a__     		=     iterate.next
  
          a__     		=     " --> ".join(lowerCAmelCase   )
  
          return item_str
  
  
  
  
      def __len__(					self  :   Any   )	-> int:
        return self.size
  
  
style_context: _SCREAMING_SNAKE_CASE   						=    [0.485, 0.456, 0.406]
  _SCREAMING_SNAKE_CASE   						=    [0.229, 0.224, 0.225]
  _SCREAMING_SNAKE_CASE   						=    [0.5, 0.5, 0.5]
  _SCREAMING_SNAKE_CASE   						=    [0.5, 0.5, 0.5]
  _SCREAMING_SNAKE_CASE   						=    [0.48145466, 0.4578275, 0.40821073]
  _SCREAMING_SNAKE_CASE   						=    [0.26862954, 0.26130258, 0.27577711]
  
  