过了
by Void_struct @ 2019-07-16 22:25:32
为什么不用if (!root) root=++cnt;而用root=++cnt;
by Void_struct @ 2019-07-16 22:25:58
@[Gary_Fang](/space/show?uid=213500) 这难道不是动态开点的过程吗QAQ
by ZEROLANE @ 2019-07-17 15:33:55
@[_東方零闇_](/space/show?uid=225318) 动态开点不是要if (!root) root=++cnt;的吗QwQ
by Void_struct @ 2019-07-17 19:41:16
@[Gary_Fang](/space/show?uid=213500) 加点但是要继承鸭
by 澪lane @ 2019-07-17 20:35:49
@[東方零闇](/space/show?uid=116460) 好吧
by Void_struct @ 2019-07-17 20:50:04