回複:回複:Erdos 稱金幣題:(3星)
take 0, 1, 2, 4, 8, 16 from each bag and weigh them together.
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回複:回複:回複:Erdos 稱金幣題:(3星)
-波斯王子-
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03/10/2010 postreply
20:24:03