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那要把一个矩形内的元素全部置反怎么操作?求一个元素是否还需要求四个矩形然后利用容斥原理去计算,实在想不到好办法?

Posted by nuanran at 2006-10-06 20:58:42 on Problem 2155
In Reply To:直接把两重循环套起来就可以了吧…… Posted by:frkstyc at 2006-10-06 20:41:39


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