From If(2), b12&b13, you didn't tell the ball is ligher or heav

来源: twfx 于 2010-05-04 15:53:01 [档案] [旧帖] [给我悄悄话] 阅读数 : (28 bytes)

回答: 回复：关于:13个球秤3次,找出异常球并指出轻重!? 由 jinjing 于 2010-05-03 17:54:46

as required, and by heart...

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