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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| ⎕IO←0 | ||
| p←↑⊃⎕NGET'p18.txt' 1 | ||
| f←{(⍺='.')∧2<+/⍵='|':'|' ⋄ (⍺='|')∧2<+/⍵='#':'#' ⋄ (⍺='#')∧(1=+/⍵='#')∨0=+/⍵='|':'.' ⋄ ⍺} | ||
| g←{⍵f⍤¯2{,⍵}⌺3 3⊢⍵} | ||
| v←{×/+/'|#'∘.=,⍵} ⍝ value | ||
| v g⍣10⊢p ⍝ part 1 | ||
| v ⍬{(≢⍺)≠n←⍺⍳⊂⍵:⍺⊃⍨n+((≢⍺)-n)|1E9-n ⋄ (⍺,⊂⍵)∇g ⍵}p ⍝ part 2 |
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