Puzzle 3026: Stairs and a corridor

Using the stack!!!

Author:	yaxlat
Date posted:	8/29/2011 8:56:51 AM
Difficulty (1..5):	1.65 (60 votes)
Popularity:	32 (39 liked, 7 disliked)
Correct solution submitted:	395

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Number of commands in the solution is shown in brackets. Shown as ? when not available.