Superman and the 5th-Dimension

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Problem description. Superman has lost his powers temporarily due to his Solar Flare attack. Mr. Mxyzpltk uses this chance to trap him in the 5th dimension. We know that the 5th dimension has wonky rules. Superman sees a N x M matrix there. Superman can gain power by selecting a submatrix. The power he gains that can be given by the size of the submatrix times the gcd of all the elements of the s

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solution.cppC++17

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