input: Write a function to convert a positive integer to negative or vice versa using the bitwise NOT operator. If the given integer is positive, it should return its negative counterpart, and if the given integer is negative, it should return its positive counterpart.
  assert convert_to_negative(5)==-5
  assert convert_to_positive(-5)==5
  assert convert_to_negative(0)==0
  assert convert_to_positive(0)==0
  assert convert_to_negative(10)==-10
  assert convert_to_positive(-10)==10
output: def convert_to_negative(n):
      return ~n + 1
  
  def convert_to_positive(n):
      return ~n + 1