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请管理员检查数据。这题数据很有可能是错误的。

Posted by xuhaoran510 at 2011-12-23 22:05:56 on Problem 3165 and last updated at 2011-12-23 22:06:26 
RT
我用的DP有4种转移，但一直WA，和朴素对拍无数组也拍不出错。
然后我去掉了其中一种转移，居然AC了。而这个AC的写法显然是错误的，很容易就能构造出数据cha掉。
因此希望管理员检查数据，或者用这组数据来跑标程
5 1
1 5
1 1 2
5 5 4
正确答案应该是3.
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