1.Maze•Video
•2http://www.jamisbuck.org/presentations/rubyconfdemo-backtracker-/#recursive011
1.Maze• http://www.jamisbuck.org/presentations/rubyconf2011/
• http://weblog.jamisbuck.org/2010/12/27/maze-
generation-recursive-backtracking
• http://en.wikipedia.org/wiki/Depth-first_search
• http://community.topcoder.com/tc?module=Static&d1
=tutorials&d2=recursionPt1