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Re:谁说说这题怎么推啊？想了很久没想出来。

Posted by faononl at 2004-03-22 21:51:51 on Problem 1354
In Reply To:谁说说这题怎么推啊？想了很久没想出来。 Posted by:Wendell at 2004-03-22 13:26:01 
固定头节点构成一条链
或者固定两个头节点构成两条链
算算一共两种情况有多少方案，我是这样想的
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