I had a stupid bug in the shortest path searching - I forgot to update the distance in some cases. What helped me a lot to debug the issue was this reddit answer which contains a correct solution shown step by step, so you can compare yours and analyse the differences.
I guess posting the code in this case is useless. It's 342 lines of Perl code that started with good intentions (objects in Moo with lazy builders and after modifiers) but grew a bit dishevelled alongside my frustration.
Here's an animation of the part 2 solution:
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I had a stupid bug in the shortest path searching - I forgot to update the distance in some cases. What helped me a lot to debug the issue was this reddit answer which contains a correct solution shown step by step, so you can compare yours and analyse the differences.
I guess posting the code in this case is useless. It's 342 lines of Perl code that started with good intentions (objects in Moo with lazy builders and after modifiers) but grew a bit dishevelled alongside my frustration.
Here's an animation of the part 2 solution:
