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呵呵，改成递推就AC了

Posted by JiangLY at 2005-05-06 21:12:13 on Problem 1354
In Reply To:不会吧？72k 0ms就行了啊 Posted by:frkstyc at 2005-05-06 21:03:22 
> 一个int表示7个十进位，保存中间结果避免重复计算（从1012学来的）
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