摘要:
任意门:https://www.lydsy.com/JudgeOnline/problem.php?id=2763 2763: [JLOI2011]飞行路线 Description Alice和Bob现在要乘飞机旅行,他们选择了一家相对便宜的航空公司。该航空公司一共在n个城市设有业务,设这些城市分别 阅读全文
摘要:
任意门:https://www.luogu.org/problemnew/show/P2939 Revamping Trails 题目描述 Farmer John dutifully checks on the cows every day. He traverses some of the M ( 阅读全文