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Line 21: ;Extra credit. Solve the following ~~problems~~problem: ~~<pre>~~ ~~2 1 3 4~~ ~~5 6 7 8~~ ~~9 10 11 12~~ ~~13 14 15 0~~ ~~</pre>~~ ~~and~~ <pre> 0 12 9 13

15 puzzle solver: Difference between revisions

15 puzzle solver (view source)