Convex hull
Front cheese
Vector
Directed line segment.
Expressed as follows:
\(\overrightarrow{p1 p2}\)
Which is the starting point p1, p2 is the end point
The length of the vector is represented as follows:
$ |\overrightarrow{p1 p2}| $
Vector cross product
As shown below:
Do title record:
The first question Luo Gu P2742 dimensional convex hull [template] / [USACO5.1] circle cow Fencing the Cows
The second question Luo Gu P2116 walls / poj 1113 wall
The third question
Fourth Question
The fifth question