Editorial for Mock CCC '18 Contest 3 J5/S3 - A Cookie-Cutter Problem

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Author: xiaowuc1

Consider any optimal circle. It must be the case that either it is constrained by three points (and is the circumcenter of those points) or it is constrained by two points and those two points form a diameter of the circle.

Therefore, it suffices to consider all circumcircles and all candidate diameters and take the smallest of those circles that works.


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