"""simple docstring"""






def   a_						(					lowerCamelCase       ):

				if len(lowerCamelCase       ) <= 1:
								return [tuple(lowerCamelCase       )]

				UpperCAmelCase__             =							[]

				def generate(lowerCamelCase					,			lowerCamelCase       ):
								if k == 1:
												res.append(tuple(arr[:]       )       )
												return

								generate(k - 1					,			lowerCamelCase       )

								for i in range(k - 1       ):
												if k % 2 == 0:  # k is even
																UpperCAmelCase__      ,	UpperCAmelCase__             =							arr[k - 1], arr[i]
												else:  # k is odd
																UpperCAmelCase__      ,	UpperCAmelCase__             =							arr[k - 1], arr[0]
												generate(k - 1					,			lowerCamelCase       )

				generate(len(lowerCamelCase       )					,			lowerCamelCase       )
				return res


if __name__ == "__main__":
						lowerCAmelCase__  :  Tuple						     =	input('Enter numbers separated by a comma:\n').strip()
						lowerCAmelCase__  :  List[Any]						     =	[int(item) for item in user_input.split(',')]
						print(heaps(arr))




"""simple docstring"""






import math



def   a_						(					lowerCamelCase					,			lowerCamelCase       ):
				if (
				    not isinstance(lowerCamelCase					,			(int, float)       )
				    or power_factor < -1
				    or power_factor > 1
				):
								raise ValueError('power_factor must be a valid float value between -1 and 1.'       )
				return apparent_power * power_factor



def   a_						(					lowerCamelCase					,			lowerCamelCase       ):
				if (
				    not isinstance(lowerCamelCase					,			(int, float)       )
				    or power_factor < -1
				    or power_factor > 1
				):
								raise ValueError('power_factor must be a valid float value between -1 and 1.'       )
				return apparent_power * math.sqrt(1 - power_factor**2       )


if __name__ == "__main__":
						import doctest

						doctest.testmod()



