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Re:T.T:哪位大牛可以说说为什么第一个simple会是30的?

Posted by zhenly at 2006-09-05 18:25:17 on Problem 2772
In Reply To:T.T:哪位大牛可以说说为什么第一个simple会是30的? Posted by:koacm at 2006-07-17 18:57:58
3个人上去一趟共拿了3个箱子,10min;
3个人都下来,10min;
2个人上去一趟拿了2个箱子,10min。

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