全WA求助啊!!!

P3178 [HAOI2015] 树上操作

opt==1|opt==2询问的时候不应该是seg[x]吗
by mzgwty @ 2019-03-02 08:17:05


@[Old_Wang](/space/show?uid=79075) GG了
by Social_Zhao @ 2019-03-02 08:46:09


@[Old_Wang](/space/show?uid=79075) orz
by Social_Zhao @ 2019-03-02 08:59:11


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