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Discussion of Problem 1249. Ancient Necropolis

Hint
Posted by KingPin 2 Jun 2005 03:35
Can't solve this problem fast?

I can give a little hint:

Think about role of squares like

01
11

or

10
11

or

11
01

and finally

11
10

Thats all.
Good luck!

Edited by author 02.06.2005 03:45
Re: Hint
Posted by edya 21 Aug 2011 14:45
thank you for this advice!
Re: Hint
Posted by Edric Mao 24 Sep 2011 16:28
fantastic
Re: Hint
Posted by vlyubin 7 Mar 2012 07:14
Yeah, much better than doing DFS's and checking...