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先判断有没有解,可以用逆序对来判断。

Posted by yygy at 2014-07-26 22:10:16 on Problem 3240
In Reply To:初步想法,先把前面n-2行构造一下,最后两行用A*搜索来做。 Posted by:yygy at 2014-07-26 22:09:37


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