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Re:算法很简单呀!

Posted by dxm at 2005-04-24 19:31:20 on Problem 2419
In Reply To:算法很简单呀! Posted by:JiangLY at 2005-04-23 23:33:25 
> 把每个人听到的树放在各自的集合里，再两两比较一下就行了
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