Day 4: Scratchcards


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  • mykl@lemmy.world
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    11 months ago

    I had to give Uiua another go today. (run it here)

    {"Card 1: 41 48 83 86 17 | 83 86  6 31 17  9 48 53"
     "Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19"
     "Card 3:  1 21 53 59 44 | 69 82 63 72 16 21 14  1"
     "Card 4: 41 92 73 84 69 | 59 84 76 51 58  5 54 83"
     "Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36"
     "Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11"}
    
    LtoDec ← ∧(+ ×10:) :0
    StoDec ← LtoDec▽≥0. ▽≤9. -@0
    
    # Split on spaces, drop dross, parse ints
    ≡(⊜□≠0.⊐∵(StoDec)↘ 2⊜(□)≠@\s.⊔)
    
    # Find matches
    ≡(/+/+⊠(⌕)⊃(⊔⊢↙ 1)(⊔⊢↙¯1))
    
    # part 1
    /+ⁿ:2-1 ▽±..
    
    # part 2 - start with matches and initial counts
    =..:
    # len times: get 1st of each, rotate both, add new counts
    ⍥(⬚0+↯: ⊙⊙∩(↻1) ⊙:∩(⊢.))⧻.
    /+⊙;