[A] [B]
1 2 3
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[C] [D]
7?3 - going to 7th floor with 3 people
The problem presents a compact floor/elevator-style scenario and asks you to infer the state when reaching the 7th floor with 3 people involved. The main challenge is to abstract the diagram into states, then simulate the floor transitions or model them with search or dynamic programming while respecting the multi-person constraint.
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