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

來源: 皆兄弟也於 2010-10-12 15:33:34 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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