Record - Dec. 1st, 2020 - Exam. REC
Prob. 1Desc. & Link.行走的形式是比较自由的,因为只要走到了最优答案处就可以不管了,所以不需要考虑游戏的结束。考虑二分答案。然后预处理出每个节点到 $s$(另一棵树就是 $t$...
In mathematics you don't understand things, you just get used to them.
In mathematics you don't understand things, you just get used to them.