

def 				A_					(							a   ,				a					):

      """simple docstring"""



      sequence.append(a					)

      SCREAMING_SNAKE_CASE_			:					Union[str, Any]          =       0
      while sequence[index] != target:
            index += 1

      sequence.pop()

      if index == len(a					):
            return None

      return index


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

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









from math import factorial

def 				A_					(							a   ,				a					):

      """simple docstring"""



      return factorial(a					) / (factorial(a					) * factorial(n - r					))

def 				A_					(							):

      """simple docstring"""



      SCREAMING_SNAKE_CASE_			:					Union[str, Any]          =       0

      for i in range(1   ,				1_0_1					):
            for j in range(1   ,				i + 1					):
                  if combinations(a   ,				a					) > 1e6:
                        total += 1
      return total


if __name__ == "__main__":
    print(solution())






