I have a non-spoiler question about (ii) and (iii), which is an Alcuin river crossing problem.
As there are sisters on the neighboring island, once supplies are brought to them each trip, are the supplies considered unattended? Is this a standard Alcuin river crossing problem, or do I only need to consider maintaining complete vertex cover on one side (the origin) of the trip and not the destination?
Thanks! I also got confirmation from Jack, who is amazingly responsive:
I can’t tell you how happy it made me to read the words ‘Alcuin river problem’ and ‘vertex cover’! It is indeed just a standard version (the narrative text later explains that the sisters need to wait until after dark to come find Odetta with the loot).
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