




def       _a (		SCREAMING_SNAKE_CASE_				:							Optional[Any] , SCREAMING_SNAKE_CASE_				:							Tuple	):
					sequence.append(SCREAMING_SNAKE_CASE_	)

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

					sequence.pop()

					if index == len(SCREAMING_SNAKE_CASE_	):
										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""")










import decimal







def       _a (		):
					__lowerCAmelCase							  =			0
					__lowerCAmelCase							  =			decimal.Context(prec=1_05	)
					for i in range(2 , 1_00	):
										__lowerCAmelCase							  =			decimal.Decimal(SCREAMING_SNAKE_CASE_	)
										__lowerCAmelCase							  =			number.sqrt(SCREAMING_SNAKE_CASE_	)
										if len(str(SCREAMING_SNAKE_CASE_	)	) > 1:
															answer += int(str(SCREAMING_SNAKE_CASE_	)[0]	)
															__lowerCAmelCase							  =			str(SCREAMING_SNAKE_CASE_	)[2:1_01]
															answer += sum(int(SCREAMING_SNAKE_CASE_	) for x in sqrt_number_str	)
					return answer


if __name__ == "__main__":
					import doctest

					doctest.testmod()
					print(f'''{solution() = }''')




