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谢谢了

Posted by lemongxr at 2004-02-09 20:57:33 on Problem 1063
In Reply To:Re:这题有公式么,谁能给点提示么。 好像和置换群有关 Posted by:pladene at 2004-02-03 09:17:07
> 考虑每flip一次,盘子位置的变化。
> 给盘子所在位置按1,2,3,……编号,如果总数是奇数,则通过flip,盘子可以到任何位置;否则,flip不能改变其所在位置的奇偶性

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