中文说明：凸包 凸包问题的实现 有无数点，求能包含这些点的图形的最小面积-Convex hull Convex hull problem of realization there are numerous points, seek to include these points, the graphics, the minimum size
English Description：
Convex hull Convex hull problem of realization there are numerous points, seek to include these points, the graphics, the minimum size