[Usa2022P1] Finish proof#203
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Use a Hall-style transversal lemma from the density bound. Apply it to both colors, interpolate between the two transversals by swaps, and trim rows to get the required cells. Assisted-by: OpenAI Codex
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Use a Hall-style transversal lemma from the density bound. Apply it to both colors, interpolate between the two transversals by swaps, and trim rows to get the required cells.
Assisted-by: OpenAI Codex