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最长链

Posted by qiaokan at 2008-04-23 11:31:48 on Problem 2762
dfs找最长链复杂度o(e)的怎么搞

1-2
1-3
3-4
2-4

4后面一大堆的图怎么弄呢
那样就不是o(e)了吧。。

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