黑车两轮店面

2轮店⾯:

  1. Design delayed scheduler
    You need to talk about all the pros and cons
  2. Carpool combinations: given N users, each person has a (pick up time, drop off time), print all combinations of pickups and dropoffs schedule. E.g, (p1, d1), (p2, d2) for 2 persons, then you need to print
    [[p1, d1, p2, d2], [p1, p2, d1, d2], [p1, p2, d2, d1], [p2, p1, d1, d2], [p2, p1, d2, d1]]