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ft,原来一直没真正看懂题目.....

Posted by ArXoR at 2005-01-27 19:19:46 on Problem 2159
In Reply To:Re:想问一下，Substitution cipher的意思，是不是任何一个字母，都能换成任意一个其它的字母呢？ Posted by:tq at 2005-01-27 16:44:57 
> Substitution cipher的意思是替代密码,
> 即对26个字母产生一个对应的表,
> 但只能是一一对应,不能是多对一或一对多.
> 明白了吧?
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