摘要：
"[luoguP2763]" 就在upd的时候记录一下答案就好啦！ 懒得去深究我的玄学REQAQ(好像是有可能e[pre[x]^1].v指向的是其他点？？？但我觉得不可能啊... c++ include include include include include include using na 阅读全文
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"[BZOJ3504]" "[luoguP3163]" c++ include include include include include include using namespace std; define Min(x,y) ((x)void rd(t &x){ x=0;int w=0;ch 阅读全文
摘要：
"luogu1231" 蒟蒻HansBug在一本语文书里面发现了一本答案，然而他却明明记得这书应该还包含一份练习题。然而出现在他眼前的书多得数不胜数，其中有书，有答案，有练习册。已知一个完整的书册均应该包含且仅包含一本书、一本练习册和一份答案，然而现在全都乱做了一团。许多书上面的字迹都已经模糊了，然 阅读全文