

from __future__ import annotations

from collections.abc import Iterator






class 						__magic_name__    :


 def __init__(						self		: Union[str, Any]			,						lowerCAmelCase__		: int    )    ->      Union[str, Any]:
   UpperCAmelCase					      =  value
   UpperCAmelCase					      =  None
   UpperCAmelCase					      =  None






class 						__magic_name__    :


 def __init__(						self		: Any			,						lowerCAmelCase__		: Optional[int]    )    ->      List[Any]:
   UpperCAmelCase					      =  tree


 def _UpperCamelCase	(						self		: List[str]			,						lowerCAmelCase__		: Union[str, Any]    )    ->      int:

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


 def __iter__(						self		: str    )    ->      Union[str, Any]:
   yield self.depth_first_search(self.tree    )


if __name__ == "__main__":
      import doctest

      doctest.testmod()






def      _lowerCAmelCase(	__A			):
  assert column_title.isupper()
  UpperCAmelCase					      =  0
  UpperCAmelCase					      =  len(__A			) - 1
  UpperCAmelCase					      =  0

  while index >= 0:
    UpperCAmelCase					      =  (ord(column_title[index]			) - 64) * pow(26   ,       __A			)
    answer += value
    power += 1
    index -= 1

  return answer


if __name__ == "__main__":
      from doctest import testmod

      testmod()



