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just search!! :)

Posted by achilles at 2004-10-30 15:08:25 on Problem 1950
In Reply To:这个题目大家是怎么过的,怎么计算有多少种合乎提条件的情况! Posted by:hujk2008 at 2004-10-30 13:13:23
> 我是直接先算出来,呵呵,居然ac了

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