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Re:其实这么想就简单了

Posted by FR2007 at 2010-06-20 02:18:16 on Problem 2521
In Reply To:其实这么想就简单了 Posted by:xjtudaniel at 2009-09-19 11:38:09
。。。商人花的钱-商人得的真钱。
n+c-(m+c-p)=n+p-m

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