Recover Square

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A long time ago, a grid with $N$ rows and $N$ columns had mysteriously vanished. The cells of this grid contain integers $1$ through $N\cdot N$ in some order. You do not know this order, but some information remains to this day: $M$ pairs of cells with Manhattan distance $1$ or $2$. You should find a grid satisfying the following conditions (or decide that it does not exist): - The cells of the g

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solution.cppC++17

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