input: def positive_feedback_loop(n: int) -> None:
      """
      Design a positive feedback loop for the given python program.
      If the loop completes (i.e., when i reaches n), print a congratulatory message.
      >>> 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!")