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Re:能不能用排列组合的方法解?

Posted by zllang at 2007-09-19 15:12:55 on Problem 1664
In Reply To:Re:能不能用排列组合的方法解? Posted by:y07yangruilong at 2007-08-26 11:00:10
偶的数学有点烂~~55555555
头痛

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