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我弱智啊。。。。。。。。。

Posted by tangjiming at 2008-05-07 13:05:10 on Problem 1703
在D [a][b]时  只把opp[father(a)]=opp[father(b)] opp[father(b)]=opp[father(a)]   竟然忘记把opp[a]=b,opp[b]=a................
我弱智啊。。。。。。。。。。。。。。。。

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