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这样是不是等同于随机+调整?

Posted by TN at 2005-06-24 18:33:32 on Problem 2438
In Reply To:构造法之一 Posted by:children_s_dining at 2005-06-24 18:13:17
> 就是序列...AB...
> 出现A和B是敌人的情况,就一定可以找到CD,使得C是A的朋友,D是B的朋友,就是形如:...AB...CD...。证明略
> 这样变为...AC...BD...,就是把链B..C翻转
> 可以在有限步内停止
>  

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