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如果没记错，答案应该是唯一的

Posted by frkstyc at 2007-03-01 18:09:32 on Problem 1166
In Reply To:Re:先得到的结果一定是最短的么？ Posted by:challenger at 2007-03-01 17:36:45 
> 我也是有一样的问题，搜索到第一个就可以了，而且提交之后，通过。
> 
> 如果想把所有的都搜索出来，然后再挑选一个最短的，会TLE。
> 
> 有什么方法能证明第一个搜索出来的一定是最短的吗？
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