~~提高篇资料发一下~~
by zxz0114 @ 2019-08-05 19:24:00
~~网上都是~~，我给粘过来，等等
by fashoint @ 2019-08-05 19:25:11
[证明](https://blog.csdn.net/liufeng_king/article/details/8678316)
by fashoint @ 2019-08-05 19:28:09
T（i,j）的第一个等式还可以看懂，第二个就不会推了
by fashoint @ 2019-08-05 19:29:27
by fashoint @ 2019-08-05 19:29:51
@[fashoint](/user/121642) [这篇博客](https://www.cnblogs.com/fashpoint/p/11309412.html)讲的很好，主要在于 $\max$ 的应用
by answerend42 @ 2020-03-21 02:14:30