



"""simple docstring"""






snake_case   					=				[0, 2, 4, 6, 8]
snake_case   					=				[1, 3, 5, 7, 9]




def 			snake_case		(		lowerCAmelCase_  ,						lowerCAmelCase_  ,						lowerCAmelCase_  ,						lowerCAmelCase_	)						->				int:
  if remaining_length == 0:
    if digits[0] == 0 or digits[-1] == 0:
      return 0

    for i in range(length // 2 - 1  ,						-1  ,						-1	):
      remainder += digits[i] + digits[length - i - 1]

      if remainder % 2 == 0:
        return 0

      remainder //= 10

    return 1

  if remaining_length == 1:
    if remainder % 2 == 0:
      return 0

    _snake_case   	=      0
    for digit in range(10	):
      _snake_case   	=      digit
      result += reversible_numbers(
          0  ,						(remainder + 2 * digit) // 10  ,						lowerCAmelCase_  ,						lowerCAmelCase_	)
    return result

  _snake_case   	=      0
  for digita in range(10	):
    _snake_case   	=      digita

    if (remainder + digita) % 2 == 0:
      _snake_case   	=      ODD_DIGITS
    else:
      _snake_case   	=      EVEN_DIGITS

    for digita in other_parity_digits:
      _snake_case   	=      digita
      result += reversible_numbers(
          remaining_length - 2  ,						(remainder + digita + digita) // 10  ,						lowerCAmelCase_  ,						lowerCAmelCase_  ,						)
  return result




def 			snake_case		(		lowerCAmelCase_ = 9	)						->				int:
  _snake_case   	=      0
  for length in range(1  ,						max_power + 1	):
    result += reversible_numbers(lowerCAmelCase_  ,						0  ,						[0] * length  ,						lowerCAmelCase_	)
  return result


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










"""simple docstring"""






from ..utils import DummyObject, requires_backends



class     UpperCAmelCase    (	metaclass=__SCREAMING_SNAKE_CASE  ):
   A__		:	Optional[int]           =  ['''torch''', '''scipy''']



   def __init__(       self    :	Any							,       *__lowerCamelCase    :	List[Any]							,       **__lowerCamelCase    :	Any				):



     """simple docstring"""
     requires_backends(self							,       ['''torch''', '''scipy''']				)



   @classmethod
   def    __UpperCAmelCase    (       cls    :	Dict							,       *__lowerCamelCase    :	List[str]							,       **__lowerCamelCase    :	Tuple				):



     """simple docstring"""
     requires_backends(cls							,       ['''torch''', '''scipy''']				)





   @classmethod
   def    __UpperCAmelCase    (       cls    :	int							,       *__lowerCamelCase    :	Union[str, Any]							,       **__lowerCamelCase    :	Tuple				):



     """simple docstring"""
     requires_backends(cls							,       ['''torch''', '''scipy''']				)





