- "Mastermind: how many valid solutions remain after the scores you've seen\n",
- "How many scores are possible for this attempt?~"
+ "## Lift simulator\n",
+ "Given a sequence of lift calls (time of call, floor of call, destination of passenger), what is the best solution to move all the passengers? Cost sum of passenger waits, where a passenger wait is the time between calling a lift and arriving at destination.\n",
+ "\n",
+ "Extension: multiple lifts?\n",
+ "\n",
+ "Extension: limited capacity in lift"