xws117的专栏

# include # include using namespace std; int num[1010],pre[1010]; char s[5]; struct point { double x,y; }; struct Edge { point a,b; }E[1010]; int onseg(point a,point b,point c) { return c.x=min(

# include # include # include using namespace std; struct node { double x,y; }vex[109],ans[109]; int cmp(node a ,node b) { if(a.x==b.x) return a.y<b.y; else return a.x<b