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

來源: 康MM 於 2010-05-03 03:59:22 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (123 bytes)

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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