Cells 【THE 30th ACM/ICPC ASIA REGIONAL 2005 HANGZHOU SITE Problem C: C】
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一【波】三折的,我好弱,蒟蒻。
题目给定一棵树,问某甲是不是某乙的祖先。
DFS ,记录每个节点节点出入的时间。父节点出入的时间一定是涵盖儿子们的出入时间的。
波了个折的。。。
TLE --> TLE --> TLE --> TLE --> TLE --> TLE --> SF --> SF --> MLE --> WA --> AC
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