input: def convert_bitwise(number: int) -> int:
      """Convert a positive integer to negative or negative to positive using the bitwise NOT operator.
      >>> convert_bitwise(5)
      -5
      >>> convert_bitwise(-10)
      10
      >>> convert_bitwise(0)
      0
      """
      if number > 0:
          return ~number + 1
      elif number < 0:
          return ~(number - 1)
      else:
          return 0
output:     if number > 0:
          return ~number + 1
      elif number < 0:
          return ~(number - 1)
      else:
          return 0