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两遍LIS解决

Posted by tomorrow911 at 2009-03-24 22:57:50 on Problem 1836
In Reply To:ac百题留念（虽然大部分是水题） Posted by:tomorrow911 at 2009-03-24 22:54:07 
从头到尾， 再从尾到头两遍LIS
在从两个结果集中选择两个记录的和最大
注意两个记录不一定相邻
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