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Re:管理员请来。。这题数据中有 （x,x] (x,x) [x,x)等不合法的表示吗？。。。不要告诉我这些表示合法。。。

Posted by wpolly at 2007-05-24 22:11:23 on Problem 3225
In Reply To:管理员请来。。这题数据中有 （x,x] (x,x) [x,x)等不合法的表示吗？。。。不要告诉我这些表示合法。。。 Posted by:273544537 at 2007-05-24 21:10:13 
这些就是空集啊。。
> 我用控制变量法得到数据中有，当然也有可能我的程序错了。。。
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