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Re:树型DP还是很有意思的,但是大家千万注意

Posted by zhymaoiing at 2009-05-22 00:41:23 on Problem 1947
In Reply To:树型DP还是很有意思的,但是大家千万注意 Posted by:smallbox at 2009-05-15 21:05:38 
其实无论什么DP。。想清楚了就不会错。。

话说这个题目我写了好久。。至少一个小时。。

老是因为没有想清楚重新开始写。。
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