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这题不是和去年四川赛区网络预赛中的一道题目相同吗

Posted by honghu at 2006-07-30 17:30:24 on Problem 2893
In Reply To:这道题目其实判断置换的奇偶性也能求解 Posted by:huicpc21 at 2006-07-30 17:16:43
          

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