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






def 	a_		(	__lowercase       :     int	, __lowercase       :     int	, __lowercase       :     list[int]	, __lowercase       :     int			)			->  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	, __lowercase	, __lowercase			)
						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	, __lowercase	, __lowercase	, )
			return result






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


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

def 	a_		(	__lowercase       :     list[int]	, __lowercase       :     list[int]			)			->  tuple[float, float]:

			# Check if the input is valid
			if not len(__lowercase			) == len(__lowercase			) == 3:
						raise ValueError('Please enter a valid equation.'			)
			if equationa[0] == equationa[1] == equationa[0] == equationa[1] == 0:
						raise ValueError('Both a & b of two equations can\'t be zero.'			)

			# Extract the coefficients
			_snake_case     , _snake_case     , _snake_case          =      equationa
			_snake_case     , _snake_case     , _snake_case          =      equationa

			# Calculate the determinants of the matrices
			_snake_case          =      aa * ba - aa * ba
			_snake_case          =      ca * ba - ca * ba
			_snake_case          =      aa * ca - aa * ca

			# Check if the system of linear equations has a solution (using Cramer's rule)
			if determinant == 0:
						if determinant_x == determinant_y == 0:
									raise ValueError('Infinite solutions. (Consistent system)'			)
						else:
									raise ValueError('No solution. (Inconsistent system)'			)
			else:
						if determinant_x == determinant_y == 0:
									# Trivial solution (Inconsistent system)
									return (0.0, 0.0)
						else:
									_snake_case          =      determinant_x / determinant
									_snake_case          =      determinant_y / determinant
									# Non-Trivial Solution (Consistent system)
									return (x, y)