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It’s a minimal separator. A separator is minimal if no subset of it forms a separator.

Posted by mayp at 2007-04-14 15:49:02 on Problem 2056
In Reply To:哪位大牛能告诉我可不可以这样走? Posted by:wubin_s1 at 2007-04-04 20:17:03
so this case is impossible to occur...
> 6 6
> WWWWSS
> WWWWWS
> WWWSSS
> WWWSBB
> WWWSBB
> WWWSBB

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