Square in rectangles

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Squarectiland is a 2-dimensional plane that can be assumed to infinitely extend in all directions. There is a universal Cartesian coordinate system in Squarectiland, and thus each point is uniquely described by its coordinates $(x, y)$. The king of Squarectiland wants to build a new palace. The palace has to be a square with sides aligned with the coordinate axes. The palace can be arbitrarily la

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solution.cppC++17

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