a=513+n,b=513+n-1 c=513-n-1 and d=513-n-2. 1<=n<=511. I lik

来源: 皆兄弟也于 2010-10-12 15:33:34 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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