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北京大学《ACM/ICPC大学生程序设计竞赛训练》暑期课面向全球招生!

这……拿动态树爆搞这题就没意思了丫……

Posted by xuhaoran510 at 2011-06-20 20:23:39 on Problem 2763
In Reply To:动态树真是好东西,1200ms+AC Posted by:sunmeng94 at 2011-06-20 19:25:58
rt

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