input: Write a function to design a positive feedback loop for the given Python program. The function should modify the original program by adding a feedback mechanism that prints "You've got it!" when the loop completes its iteration. If the input program is empty, the function should return the original program without any modification.
  def positive_feedback_loop(program):
      if not program:
          return program
      modified_program = program.replace("for i in range(10):", "for i in range(10):\n    print(\"hello\")\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")")
      return modified_program
  
  assert positive_feedback_loop("for i in range(10):\n    print(\"hello\")") == "for i in range(10):\n    print(\"hello\")\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")"
  assert positive_feedback_loop("") == ""
  assert positive_feedback_loop("for i in range(5):\n    print(\"hi\")") == "for i in range(5):\n    print(\"hi\")\n    i += 1\n    if i == 5:\n        print(\"You've got it!\")"
output: def positive_feedback_loop(program):
      if not program:
          return program
      modified_program = program.replace("for i in range(10):", "for i in range(10):\n    print(\"hello\")\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")")
      return modified_program