Pair Stones

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Joe has found a strange stone on his way back home. At night he had a strange dream. He was on a mountain, on front of his were rows and columns of strange stones, in sequence smaller to bigger both along row and columns in a square.A mystic voice called out 'Can you find out the stone of the same size as yours, if you do your's is a powerful magic Pair Stone!! Joe was standing in the corner

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solution.cppC++17

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