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只考虑相邻的？？显然数据太水了，随便加上一组数据就能rj掉一堆人

Posted by Snow_storm at 2010-10-27 13:51:28 on Problem 2393 and last updated at 2010-10-27 13:56:22 
比如
3 5
1 100
16 100
20 100

显然答案是1800  而不是2700

当然程序写出来可以是O(n)，每次更新上一周的价格就OK。
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