YRC1993的专栏

三维凸包模版（ps:不知哪位神牛写的。。膜拜）+暴力#include#include#include#define eps 1e-7#define MAXV 1005using namespace std;//三维点struct pt{ double x, y, z; pt(){} pt(double _x, double _y, double _z):

void get_xyz(double x1,double y1,double z1, double x2,double y2,double z2, double x3,double y3,double z3, double x4,double y4,double z4, double &x,d