Day 5: Cafeteria
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FAQ
- What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268
- Where do I participate?: https://adventofcode.com/
- Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465
Uiua
It took me a while to work out the merging of ranges, but I’m very pleased with the solution.
Run it here
D ← "3-5\n10-14\n16-20\n12-18\n\n1\n5\n8\n11\n17\n32" # D ← &fras"2025day05.txt" # drop your input file on this pane and uncomment this line to test against your own data. Parse ← ∩(⊜⋕⊸∊+@0⇡10)°□₂⊜□¬⊸⦷"\n\n" Merge ← ⨬( ⨬(⊟ # -> distinct, keep both. | ⊂⊢⟜(↥∩⊣) # -> overlap, merge them. )◡(≤⊓⊣⊢) | ⊙◌ # -> inside, ignore it. )◡(≤∩⊣) Ranges ← ⊙◌⍥⍜⊣(Merge⊙°⊂)◡⋅⧻⊃↙↘1⍆↯∞_2 # Merge pairs of ranges. P₁ ← /+≡⌞(/↥≡⌟(↧⊓⌟≥≤°⊟)) P₂ ← /+≡(+1/-)⊙◌ ⊃P₁ P₂ Ranges Parse D