orzlyx %%%
by devout @ 2020-02-27 12:23:05
那这样的话是不是中序遍历就不对了我猜的qwq
by devout @ 2020-02-27 12:28:58
[隐含条件：输出字典序最小的前序遍历](https://www.luogu.com.cn/discuss/show/168045)
by suomynonA @ 2020-02-28 20:20:51
同，我也错这了，把左端点当根判断优先就A了
by AisingioroHao @ 2020-04-08 20:39:47