



'''simple docstring'''

_A				:    str     						=[0, 2, 4, 6, 8]
_A				:    List[Any]     						=[1, 3, 5, 7, 9]







def 						__UpperCamelCase				(							_lowercase,				_lowercase,				_lowercase,				_lowercase					) ->			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

		_lowercase					:       List[str]       =		0
		for digit in range(10					):
			_lowercase					:       List[Any]       =		digit
			result += reversible_numbers(
			    0,				(remainder + 2 * digit) // 10,				UpperCAmelCase__,				UpperCAmelCase__					)
		return result

	_lowercase					:       List[Any]       =		0
	for digita in range(10					):
		_lowercase					:       Dict       =		digita

		if (remainder + digita) % 2 == 0:
			_lowercase					:       List[Any]       =		ODD_DIGITS
		else:
			_lowercase					:       Optional[Any]       =		EVEN_DIGITS

		for digita in other_parity_digits:
			_lowercase					:       Any       =		digita
			result += reversible_numbers(
			    remaining_length - 2,				(remainder + digita + digita) // 10,				UpperCAmelCase__,				UpperCAmelCase__,				)
	return result







def 						__UpperCamelCase				(							_lowercase = 9					) ->			int:
	_lowercase					:       Union[str, Any]       =		0
	for length in range(1,				max_power + 1					):
		result += reversible_numbers(UpperCAmelCase__,				0,				[0] * length,				UpperCAmelCase__					)
	return result


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





'''simple docstring'''

_A				:    Dict     						='''
# Transformers installation
! pip install transformers datasets
# To install from source instead of the last release, comment the command above and uncomment the following one.
# ! pip install git+https://github.com/huggingface/transformers.git
'''

_A				:    Dict     						=[{'''type''': '''code''', '''content''': INSTALL_CONTENT}]
_A				:    Dict     						={
    '''{processor_class}''': '''FakeProcessorClass''',
    '''{model_class}''': '''FakeModelClass''',
    '''{object_class}''': '''FakeObjectClass''',
}
