题目5718 · 脑筋急转弯
The Carry-One Ferry with Incompatible Cargo
A trader must ferry three items — a fox, a goose, and a sack of beans — across a river in a small boat that can carry the trader plus at most one item per trip. If left together unattended, the fox eats the goose, and the goose eats the beans (the fox ignores the beans). The trad
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