回复：10000 balls

来源: yk0 于 2003-07-03 23:28:00 [] [旧帖] [给我悄悄话] 阅读数 : (214 bytes)

collect 1 ball from box no.1, 2 balls from box no.2,... 100 balls from box no.100, and weight. Based on the total weight, the number of lighter balls can be calculated, then the box no. with lighter balls is found.



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