

def 	snake_case_      (__A     :						str					,   __A     :						List[str]     )			->	Optional[Any]:
   sequence.append(__A     )

   __lowerCAmelCase  :			Tuple					    =						0
   while sequence[index] != target:
      index += 1

   sequence.pop()

   if index == len(__A     ):
      return None

   return index


if __name__ == "__main__":
   __UpperCAmelCase      = input("""Enter numbers separated by comma:\n""").strip()
   __UpperCAmelCase      = [int(item) for item in user_input.split(""",""")]

   __UpperCAmelCase      = input("""Enter a single number to be found in the list:\n""")
   __UpperCAmelCase      = int(target_input)
   __UpperCAmelCase      = sentinel_linear_search(sequence, target)
   if result is not None:
      print(F'{target} found at positions: {result}')
   else:
      print("""Not found""")



"""simple docstring"""


from __future__ import annotations





def 			lowerCamelCase_ (					__lowerCAmelCase				)							->					int | float:




						'''simple docstring'''



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


if __name__ == "__main__":
	import doctest

	doctest.testmod(verbose=True)


