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这样是不是等同于随机+调整?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 > Followed by:
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