The words encode a partial order between characters. Turn each adjacent pair into a directed edge, then topologically sort. The traps are the prefix edge case and detecting contradictions. Here is the full solution with cycle handling.
Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.
The words encode a partial order between characters. Turn each adjacent pair into a directed edge, then topologically sort. The traps are the prefix edge case and detecting contradictions. Here is the full solution with cycle handling.
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