good for a few guesses; but not for a lot guesses.

来源: 皆兄弟也 于 2010-06-17 01:14:11 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

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• Yes,we can cancel 81,49,36,25,16 by number theory. -jinjing- ♀ 给 jinjing 发送悄悄话 (0 bytes) () 06/17/2010 postreply 16:13:58

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