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Attention this

Posted by felix_hsiang at 2009-05-05 13:20:51 on Problem 1686 and last updated at 2009-05-06 08:31:31
In Reply To:一种下流的做法..... Posted by:zsasuke at 2009-03-03 21:39:22
>    其实这题如果没有这些字母,而都是数字,那么确实不难做,但是多了这些字母,这题我觉得很难.实在没辙了,但是把这些字母都换成一些比较大的数字,居然ac了,如此一来看来题目的数据确实太不严谨了.

Attention this: 
    Single digit numbers. 

so choose some large prime number instead of each alpha can solve.

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