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Re:再把最后两行前几列移好,最后三列就对应八数码问题的最后两列。应该是这样吧。那应该算简单题啊。怎么这么少人做对。题目没说输出最少步数吧。

Posted by Los_Angelos_Laycurse at 2014-07-27 00:33:25 on Problem 3240
In Reply To:再把最后两行前几列移好,最后三列就对应八数码问题的最后两列。应该是这样吧。那应该算简单题啊。怎么这么少人做对。题目没说输出最少步数吧。 Posted by:yygy at 2014-07-26 23:16:23
用神马方法把最后两行的前几列移好?  如果直接构造的话,比如先把第一列移好以后

不能保证后面的有解(不移动前面一列的前提下),因为逆序数的奇偶性可能改变

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