input: 
  def positive_feedback_loop(n: int) -> None:
      """ Adds a positive feedback mechanism to a simple loop that prints 'hello' n times.
      After the last 'hello' is printed, a message 'You've got it!' is displayed.
      >>> positive_feedback_loop(10)
      hello
      hello
      hello
      hello
      hello
      hello
      hello
      hello
      hello
      hello
      You've got it!
      """
  
output:     for i in range(n):
          print("hello")
      print("You've got it!")