





def 							SCREAMING_SNAKE_CASE__						(    __a   ):
 snake_case_		:			List[str]											=	n ** (1 / 3)
 return (val * val * val) == n


if __name__ == "__main__":
      print(perfect_cube(27))
      print(perfect_cube(4))








import numpy as np


def 							SCREAMING_SNAKE_CASE__						(    __a   ):
	return (2 / (1 + np.exp(-2 * vector   ))) - 1


if __name__ == "__main__":
						import doctest

						doctest.testmod()

