Advent Of Code

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An unofficial home for the advent of code community on programming.dev!

Advent of Code is an annual Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like.

AoC 2024

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🐮 - 2024 DAY 10 SOLUTIONS - 🐮 (programming.dev)

submitted 2 weeks ago by [email protected] to c/[email protected]

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Day 10: Hoof It

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[–] [email protected] 3 points 2 weeks ago* (last edited 1 week ago)

Uiua

Run it here!

How to read this

Uiua has a very helpful path function built in which returns all valid paths that match your criteria (using diijkstra/a* depending on whether third function is provided), making a lot of path-finding stuff almost painfully simple, as you just need to provide a starting node and three functions: return next nodes, return confirmation if we've reached a suitable target node (here testing if it's = 9), (optional) return heuristic cost to destination (here set to constant 1), .

Data   ← ⊜≡⋕⊸≠@\n"89010123\n78121874\n87430965\n96549874\n45678903\n32019012\n01329801\n10456732"
N₄     ← ≡+[0_1 1_0 0_¯1 ¯1_0]¤
Ns     ← ▽:⟜(=1-:∩(⬚0⊡:Data))▽⊸≡(/×≥0)N₄. # Valid, in-bounds neighbours.
Count! ← /+≡(⧻^0⊙◌ path(Ns|(=9⊡:Data)|1))⊚=0Data
&p Count!(◴≡◇⊣)
&p Count!∘