Gems on the Bangle

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Sneha has a bangle on which there are n even-spaced gems. There is a microscopic number written on each gem in the bangle. You are supposed to choose a positive real number h. Then you may repeatedly select 2 or more gems that are evenly-spaced and make a set. Then increase all numbers on gems by h or decrease all numbers by h. Would you eventually end up with all numbers equal to 0. Is it poss

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solution.cppC++17

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