ISL 2004 C5
and play a game, given an integer , writes down first, then every player sees the last number written and if it is then in his turn he writes or , but his number cannot be bigger than . The player who writes wins. For which values of does win?
Proposed by A. Slinko & S. Marshall, New Zealand
Dataset text AI-MO AoPS. Quoted with source.
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No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
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