





'''simple docstring'''

from __future__ import annotations

from collections.abc import Iterator







class __a :





   def __init__(					self				:			Optional[int]				,lowerCamelCase				:			int    ):

      '''simple docstring'''

      __SCREAMING_SNAKE_CASE      							=       value
      __SCREAMING_SNAKE_CASE      							=       None
      __SCREAMING_SNAKE_CASE      							=       None







class __a :





   def __init__(					self				:			int				,lowerCamelCase				:			Node    ):

      '''simple docstring'''

      __SCREAMING_SNAKE_CASE      							=       tree





   def      UpperCAmelCase__     (					self				:			Optional[int]				,lowerCamelCase				:			Node | None    ):

      '''simple docstring'''

      if node is None:
         return 0
      return node.value + (
          self.depth_first_search(node.left    ) + self.depth_first_search(node.right    )
      )





   def __iter__(					self				:			List[str]    ):

      '''simple docstring'''

      yield self.depth_first_search(self.tree    )


if __name__ == "__main__":
    import doctest

    doctest.testmod()












'''simple docstring'''

def 						__magic_name__       (							__UpperCAmelCase      )						->					bool:

   '''simple docstring'''







   if num < 0:
      return False

   __SCREAMING_SNAKE_CASE      							=       num
   __SCREAMING_SNAKE_CASE      							=       0
   while num > 0:
      __SCREAMING_SNAKE_CASE      							=       rev_num * 10 + (num % 10)
      num //= 10

   return num_copy == rev_num


if __name__ == "__main__":
    import doctest

    doctest.testmod()





