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用了DP,但是还是不大明白什么是DP,只知道回溯

Posted by fany at 2008-08-12 16:42:46 on Problem 3176
从最后一行回溯,最后一行每两个数和前面一行判断那个和大,
用和大的那个替换原数,一直回溯的第一行.最后那个和就是答案.

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