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there'll be at most one interval in this problem

Posted by frkstyc at 2007-04-01 16:53:09 on Problem 3215
In Reply To:what's the output style if the solution space consists of two (or more) intervals without intersection? Posted by:ZJUACHunter at 2007-04-01 16:50:52 
> example:
> 3
> 0 0
> 1 1
> 1 -1
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