



def      A_ (		__a       :			Optional[int]						):

				"""simple docstring"""
				if num < 0:
								return -1
				return 1 if num else 0

def      A_ (		):

				"""simple docstring"""
				assert signum(5						) == 1
				assert signum(-5						) == -1
				assert signum(0						) == 0


if __name__ == "__main__":
	print(signum(12))
	print(signum(-12))
	print(signum(0))






from __future__ import annotations

def      A_ (		__a       :			list[int | float]						):

				"""simple docstring"""
				if len(__a						) == 0:
								raise ValueError("""find_max() arg is an empty sequence"""						)
				a__			 =						nums[0]
				for x in nums:
								if x > max_num:
												a__			 =						x
				return max_num


if __name__ == "__main__":
	import doctest

	doctest.testmod(verbose=True)

