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前提是一定有解

Posted by Tullius at 2011-05-10 21:14:42 on Problem 1013
In Reply To:Re:虽然可以AC,但怀疑这个思路的正确性 Posted by:yogafrank at 2007-06-09 23:05:30
前提是一定有解,所以这个方法是对的

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