Shulou(Shulou.com)06/01 Report--

Editor to share with you how to understand the xyz judgment point in the convex hull template, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

Int njinjmjintostruct point {double xscoy;} p [100000], a [100000], ss;bool cmp (point A point B) {if (A.xpostasis B.x) return A.x1; double a1=cross (pmid]-p [0], Amurp [0]); double a2=cross (p[ mid + 1]-p [0], Amurp [0]); if (A1 > = 0&&a2=0) return true; return false } else if (A1)

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