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Re:请问这道题什么意思呀?

Posted by acmer1183 at 2010-03-01 11:43:59 on Problem 3096
In Reply To:请问这道什么意思呀? Posted by:acmer1183 at 2010-03-01 11:43:46
> The D-pairs of a string of letters are the ordered pairs of letters that are distance D from each other. A string is D-unique if all of its D-pairs are different. A string is surprising if it is D-unique for every possible distance D.
> 
> 读不懂耶……

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