Advent-of-Code VS AdventOfCode

Swift. I tried to use GameplayKit's pathfinding, but I got fed up with it being in Objective-C and not working with subtypes properly. shortestPathSources is just an implementation of Dijkstra that works on matrices.

Swift.

Swift. Algorithms had me covered for Part 2, but I had to make something for Part 1 that would allow for getting the elements of a Sequence based on sorted offsets, without having to start from the beginning each time.

I recommend SIMD2—it can save you a lot of reinventing the 2D wheel!

Swift. We don't have good types for this. 🤮

Swift. containsOnlyUniqueElements is not in the standard library; it relies on this Set initializer.

Works grood.

No, I edited my comment. I was wrong in thinking that there was a proper overload. The one I'm using is just from `extension Collection where Self.Element : Equatable` in the new _StringProcessing section for Regex. It gives the correct result, but it's not as fast as it could be. (https://stackoverflow.com/questions/64066681/check-if-one-range-is-within-another)

Swift, using some helpers for `CaseIterable`.

Code: main (445b314)

Edit: Made some of those improvements. Have a look at main. Want the original code? Check out commit c6ae21b

Code: main (de0beb6)

Code: main (5f0a9a8)

For part 1 my sneaky elves took a step north and then walked around the outside of the blizzard field. I trapped them in with additional walls \evil grin**

Python [762/731]

Python+Paper [1740/765]

Python+sympy [204/1353]

Python [213/499]

Version at time of posting: 492376c (since I've committed since then)