回复：4 times are enough for 42 balls, you need 5 times.

来源: 康MM 于 2010-05-03 03:59:22 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : (123 bytes)

回答: n次可称（3^n-3）/2个，并指出它是过轻或过重。由康MM 于 2010-05-02 07:24:54

Thanks

The formula for this classic problem is well known. you need to double check your solution to find the error.

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