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哦,我是在看你的解题报告之前想出来的……

Posted by xreborner at 2005-09-18 19:15:27 on Problem 2520
In Reply To:我想到的方法就是O(N^4)的,不过就是系数有点大…… Posted by:xreborner at 2005-09-18 14:46:15


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