Mathematics, 06.01.2020 23:31 kayabwaller4589
There are n markers, each with one side white and the other side black, aligned in a row with their white sides up. at each step, if possible, we choose a marker with the white side up (but not one of the outermost markers), remove it, and reverse the two neighboring markers. prove that one can reach a configuration with only two markers left if and only if n − 1 is not divisible by 3.
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There are n markers, each with one side white and the other side black, aligned in a row with their...
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