IL-GILLIS 2023 Problem 1
2000 people are sitting around a round table. Each one of them is either a truth-sayer (who always tells the truth) or a liar (who always lies). Each person said: "At least two of the three people next to me to the right are liars". How many truth-sayers are there in the circle?
Dataset text AI-MO AoPS. Quoted with source.
Solutions
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