Day 20 solution.

jayfoad · Jan 3, 2019 · c433bf1 · c433bf1
1 parent e4d491a
commit c433bf1
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/p20.dyalog b/p20.dyalog
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+p←1↓¯2↓⊃⎕NGET'p20.txt'
+r←s←1 2⍴0
+{⍵='(':s⍪←⊢⌿r ⋄ ⍵='|':r⍪←⊢⌿s ⋄ ⍵=')':s↓⍨←¯1 ⋄ r⍪←(⊢⌿r)+1,0J1*'NESW'⍳⍵}¨p
+t←⊃{⌊/⍵}⌸/⌽↓⍉r
+⌈/t ⍝ part 1
++/999<t ⍝ part 2