input: def convert_positive_negative(number: int) -> int:
      """ Convert a positive number to its negative equivalent or a negative number to 
      its positive equivalent using the bitwise NOT operator.
      >>> convert_positive_negative(5)
      -5
      >>> convert_positive_negative(-3)
      3
      >>> convert_positive_negative(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