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Dimitri Lozeve 2024-11-12 21:43:32 +01:00
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2020/day07/day07.dyalog Normal file
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⎕IO←0
p←'(^|\d )\w+ \w+ bag'⎕S'&'¨⊃⎕NGET'input'1
bags←⊃¨p
edges←1↓¨p
adj←edges∘.{0⌈48-⍨⎕UCS⊃⊃(∨/¨(⊂⍵)⍷¨⍺)/⍺}bags
gold←bags⍳⊂'shiny gold bag'
¯1+⍴({∪⍵,⊃¨⍸1⌊adj[;⍵]}⍣≡)1⍴gold ⍝ Part 1
inside←{⊃{∊1↓¨⍸adj[⍵;]}¨⊂⍵}
¯1+⍴∊{(inside⍣⍵)1⍴gold}¨⍳100 ⍝ Part 2