不努力，徒伤悲哇

#include #include #include #include using namespace std; #define eps 1e-6 #define pi acos(-1) struct Point{ double x,y; Point(double a=0,double b=0){ x=a,y=b; } Point operator

#include #include #include #include #include using namespace std; const int maxn=50005; struct node{ int x,y; }e[maxn],res[maxn]; int cmp(node a,node b) { if(a.x==b.x)return a.y<b.y;