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重的线段算一条，我这样过的～～～

Posted by Archimedes_ at 2007-10-02 13:12:39 on Problem 3409
In Reply To:Re:应该不是吧。。。两条一样的在一起你说是不是closed。。。 Posted by:smallcabbage at 2007-10-02 13:10:08 
> 怎么算?
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