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你的做法得到的结果比题目要求的数量多

Posted by Acsaga at 2006-11-21 21:08:04 on Problem 3088
In Reply To:不理解题意啊，哪位大牛解释一下，或者进来看看我的理解哪里不对。 Posted by:ReGoACM at 2006-11-21 20:48:36 
比如2个按钮时
（1，2）和（2，1）实际上是一种结果，但是你的方法会判定为2种。
在同一括号内的按钮是同时被按下的，没有先后顺序的差别。
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