02. Exam Preparation

fails = int(input())

total_score = 0
tasks = 0
fails_counter = 0
last_task = ""
has_failed = True

while fails_counter < fails:
  task_name = input()
  if task_name == "Enough":
    has_failed = False
    break

  score = int(input())
  if score <= 4:
    fails_counter += 1
  total_score += score
  tasks += 1
  last_task = task_name

if has_failed:
  print(f"You need a break, {fails} poor grades.")
else:
  print(f"Average score: {total_score / tasks:.2f}")
  print(f"Number of problems: {tasks}")
  print(f"Last problem: {last_task}")