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WA了N久,大家要认真领会题目的意思啊

Posted by yannzi at 2009-11-08 11:54:22 on Problem 2159
注意两点
1、 substitution cipher 方法不一定只加1
2、 Permutation cipher  方法……好吧自己仔细想想就好了。
虽然这道题目是网上传说中的水题,不过还是值得一做的,警告自己要好好地读题。

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