start for Alice starting at 0 and end for Bob starting at n - 1.aliceCC and bobCC to capacityA and capacityB respectively, representing the current capacity of their watering cans.count to keep track of the number of refills.start is less than or equal to end.
start equals end, check who should water the plant and if a refill is needed.start and Bob waters the plant at end if they have enough water, refilling if necessary.start and decrement end.count of refills.