Winter Is Here

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**Winter is here** and so are the white walkers. The war against white walker is going on a 2-D plane. Jon Snow, the heir to the Iron Throne is standing at $(0,0)$ on the plane. $N$ white walkers are coming towards the wall to attack the night's watch. Currently each white walker is at a fixed point $(x_i, y_i)$ on the 2-D plane. Horizontal distance between two points $(x_1,y_1)$

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solution.cppC++17

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