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此题要注意的地方

Posted by RectaFlex at 2009-07-12 13:46:57 on Problem 1470 
1.多组数据（比较恶心）
2.同样的询问可能有数个，而祖先的计数则要相应增加
3.数组不要开小了
祝大家多多AC
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