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回答得精妙!

Posted by tq at 2005-08-07 20:20:23 on Problem 2002
In Reply To:语言的差别只是常数级的，算法的差别就不只了 Posted by:hawk at 2005-04-24 14:07:50 
> 哪怕都是搜索，可能看起来剪枝没降低复杂度
> 但是剪的适当，效果简直不可思议
> 做过1011吗，可以先做一下那个
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