摘要：70分做法: 全排列，再枚举这个点由那个点扩展出来的即可。 cpp include include include include include include include using namespace std; typedef long long ll; const int maxm=20 阅读全文

摘要：60分做法: 暴力枚举两个没被覆盖点，形成一个合法的抛物线，在扫一遍能在抛物线上的点，打上标记即可。 cpp include include include include include include using namespace std; int t; int n,m,U,w; double 阅读全文