Problem 1903. GJam 2014 China Rd A: Maze with a Left Hand Rule

Created by Richard Zapor

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This Challenge is derived from <a href = "http://code.google.com/codejam/contest/2924486/dashboard#s=p3">GJam 2014 China Cross the Maze</a>.The Goal is to minimally traverse a Maze from a Starting Point to Finish Point in less than 10,000 moves where the Bot can only go forward and must maintain its Left Arm in contact with a wall. At the Start Point the Bot can only touch NSEW. After the first move the Bot maintains contact on diagonals. Rotations in a cul-de-sac or turning are not counted as moves.Input: [M, Start_Finish] where M is an NxN (0,1=Wall) array and Start_Finish is [Sr,Sc,Fr,Fc]Output: Path, a string of Movements {N,S,E,W}. If Path is >10,000 moves or No solution return a null string.Examples:<pre class="language-matlab">.##.#
.....
...#.
.###.
...#.
1 1 5 3
</pre>Note: (1,1) is Top Left and start point for this case.The # are replaced by 1s and '.' will be 0s.Output: SEEENSESSSNNNWWSWWSSEEContest Performance: Best Delta Time of 17 minutes with only 134 correct solutions in 3 hours.

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Problem 1903. GJam 2014 China Rd A: Maze with a Left Hand Rule

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Problem 1903. GJam 2014 China Rd A: Maze with a Left Hand Rule

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