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Re:帮忙看看这组数据

Posted by lijianlin1995 at 2013-10-22 22:00:53 on Problem 1716
In Reply To:帮忙看看这组数据 Posted by:kk9263 at 2012-02-13 15:04:54 
> 4
> 1 5
> 2 4
> 3 6
> 4 7
> 
> 
> 1 2 3 4 5 6 7 
> - - - - -
>   - - -
>     - - - -
>       - - - -
> 
> 答案是3 还是 2 ？
> AC 代码给出的是 2  ...可是我真是不知道取哪两个，是我题目理解错了？

一个数字可以取两次 取两个4
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