摘要： 1 #include 2 #include 3 #include 4 #include 5 #include 6 #include 7 using namespace std; 8 const int inf = 5020; 9 const double pai2 = 2*acos(-1); 10 struct point{ 11 int x,y,at; 12 bool tail; 13 point(int a=0,int b=0,bool t=false){ x=a,y=b; tail=t; 14 if(x > 0){ 15 ... 阅读全文