https://www.codingame.com/training/hard/cheat-solving
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Nice puzzle!
Two remarks:
- I started with the Doubly Solved Rubik’s Cube puzzle. After solving that one, this becomes a 2-minute exercise, with 99% code-reuse. (Although I recommend starting with Cheat solving, as this one is simpler.)
- My solution uses a hand-crafted constant data structure, mapping input string locations to the cube topology / adjacencies. After solving it, I checked also the contibution page and see a much more elegant, few-lines-only FP solution. The only issue: I don’t understand it at all…
It would be very educational for Haskell-dummies, such as myself, to see some explanation tech.io or blog article, explaining how to solve this puzzle in such elegant functional programming way.
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Thanks for the free puzzle, I had already solved the Doubly Solved Rubik’s cube so this one was pretty much given (tho I had to re-list my corners stickers properly in clockwise order, I didn’t bother for the previous one as I was going to check set equalities only).
I love this one because there’s no need to solve damn Rubik’s cube.
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Some of the solutions that were posted require the center spots to be unmoved (i.e. U and D remaining on opposite faces). But the cube is still solvable if all the stickers on the L and D sides are swapped.