





"""simple docstring"""





from __future__ import annotations

from collections.abc import Iterable
from dataclasses import dataclass
from typing import Any





class       snake_case		:
      lowerCamelCase__      =			('_front', '_back', '_len')





      @dataclass
      class       snake_case		:
            lowerCamelCase__      =			None
            lowerCamelCase__      =			None
            lowerCamelCase__      =			None







      class       snake_case		:
            lowerCamelCase__      =			('_cur',)

            def __init__(      self       :Any						,							_lowerCamelCase       :Deque._Node | None						):
             __SCREAMING_SNAKE_CASE			:      int 							=	cur

            def __iter__(      self       :int						):
             return self



            def 						SCREAMING_SNAKE_CASE_      (      self       :Optional[Any]						):
             if self._cur is None:
              # finished iterating
              raise StopIteration
             __SCREAMING_SNAKE_CASE			:      Optional[Any] 							=	self._cur.val
             __SCREAMING_SNAKE_CASE			:      List[Any] 							=	self._cur.next_node

             return val







      def __init__(      self       :Any						,							_lowerCamelCase       :Iterable[Any] | None = None						):
       __SCREAMING_SNAKE_CASE			:      Any 							=	None
       __SCREAMING_SNAKE_CASE			:      Any 							=	None
       __SCREAMING_SNAKE_CASE			:      int 							=	0

       if iterable is not None:
        # append every value to the deque
        for val in iterable:
         self.append(_lowerCamelCase						)

      def 						SCREAMING_SNAKE_CASE_      (      self       :List[str]						,							_lowerCamelCase       :Any						):
       __SCREAMING_SNAKE_CASE			:      Union[str, Any] 							=	self._Node(_lowerCamelCase						,							_lowerCamelCase						,							_lowerCamelCase						)
       if self.is_empty():
        # front = back
        __SCREAMING_SNAKE_CASE			:      int 							=	node
        __SCREAMING_SNAKE_CASE			:      List[Any] 							=	1
       else:
        # connect nodes
        __SCREAMING_SNAKE_CASE			:      Optional[Any] 							=	node
        __SCREAMING_SNAKE_CASE			:      str 							=	self._back
        __SCREAMING_SNAKE_CASE			:      Optional[int] 							=	node  # assign new back to the new node

        self._len += 1

        # make sure there were no errors
        assert not self.is_empty(), "Error on appending value."

      def 						SCREAMING_SNAKE_CASE_      (      self       :Optional[int]						,							_lowerCamelCase       :Any						):
       __SCREAMING_SNAKE_CASE			:      int 							=	self._Node(_lowerCamelCase						,							_lowerCamelCase						,							_lowerCamelCase						)
       if self.is_empty():
        # front = back
        __SCREAMING_SNAKE_CASE			:      Union[str, Any] 							=	node
        __SCREAMING_SNAKE_CASE			:      str 							=	1
       else:
        # connect nodes
        __SCREAMING_SNAKE_CASE			:      Dict 							=	self._front
        __SCREAMING_SNAKE_CASE			:      Optional[int] 							=	node
        __SCREAMING_SNAKE_CASE			:      Any 							=	node  # assign new front to the new node

        self._len += 1

        # make sure there were no errors
        assert not self.is_empty(), "Error on appending value."

      def 						SCREAMING_SNAKE_CASE_      (      self       :Union[str, Any]						,							_lowerCamelCase       :Iterable[Any]						):
       for val in iterable:
        self.append(_lowerCamelCase						)

      def 						SCREAMING_SNAKE_CASE_      (      self       :List[str]						,							_lowerCamelCase       :Iterable[Any]						):
       for val in iterable:
        self.appendleft(_lowerCamelCase						)

      def 						SCREAMING_SNAKE_CASE_      (      self       :Dict						):
       assert not self.is_empty(), "Deque is empty."

       __SCREAMING_SNAKE_CASE			:      Optional[int] 							=	self._back
       __SCREAMING_SNAKE_CASE			:      Optional[Any] 							=	self._back.prev_node  # set new back
       # drop the last node - python will deallocate memory automatically
       __SCREAMING_SNAKE_CASE			:      Optional[int] 							=	None

       self._len -= 1

       return topop.val

      def 						SCREAMING_SNAKE_CASE_      (      self       :Dict						):
       assert not self.is_empty(), "Deque is empty."

       __SCREAMING_SNAKE_CASE			:      Optional[Any] 							=	self._front
       __SCREAMING_SNAKE_CASE			:      Optional[Any] 							=	self._front.next_node  # set new front and drop the first node
       __SCREAMING_SNAKE_CASE			:      int 							=	None

       self._len -= 1

       return topop.val

      def 						SCREAMING_SNAKE_CASE_      (      self       :Dict						):
       return self._front is None

      def __len__(      self       :List[Any]						):
       return self._len

      def __eq__(      self       :Union[str, Any]						,							_lowerCamelCase       :object						):

       if not isinstance(_lowerCamelCase						,							_lowerCamelCase						):
        return NotImplemented

       __SCREAMING_SNAKE_CASE			:      List[Any] 							=	self._front
       __SCREAMING_SNAKE_CASE			:      Dict 							=	other._front

       # if the length of the dequeues are not the same, they are not equal
       if len(self						) != len(_lowerCamelCase						):
        return False

       while me is not None and oth is not None:
        # compare every value
        if me.val != oth.val:
         return False
        __SCREAMING_SNAKE_CASE			:      Optional[Any] 							=	me.next_node
        __SCREAMING_SNAKE_CASE			:      Optional[Any] 							=	oth.next_node

       return True

      def __iter__(      self       :Tuple						):
       return Deque._Iterator(self._front						)



      def __repr__(      self       :Optional[Any]						):
       __SCREAMING_SNAKE_CASE			:      Union[str, Any] 							=	[]
       __SCREAMING_SNAKE_CASE			:      Optional[int] 							=	self._front
       while aux is not None:
        # append the values in a list to display
        values_list.append(aux.val						)
        __SCREAMING_SNAKE_CASE			:      Any 							=	aux.next_node

       return f'''[{', '.join(repr(_lowerCamelCase						) for val in values_list						)}]'''


if __name__ == "__main__":
    import doctest

    doctest.testmod()








"""simple docstring"""





def 		lowerCAmelCase_     (  lowercase_       :							int = 30		):

 '''simple docstring'''






 __SCREAMING_SNAKE_CASE			:      str 							=	exponent + 2
 __SCREAMING_SNAKE_CASE			:      Optional[Any] 							=	(1 + 5**0.5) / 2
 __SCREAMING_SNAKE_CASE			:      Optional[int] 							=	(phi**fibonacci_index - (phi - 1) ** fibonacci_index) / 5**0.5

 return int(lowercase_		)


if __name__ == "__main__":
    print(f'{solution() = }')

