Day 3 faster.

jayfoad · Dec 3, 2018 · ddd494c · ddd494c
1 parent 0fc18bb
commit ddd494c
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/p3fast.dyalog b/p3fast.dyalog
@@ -0,0 +1,6 @@
+⎕IO←0
+p←⍎¨¨'\d+'⎕S'&'¨⊃⎕NGET'p3.txt'1
+q←{(a b c d e)←⍵ ⋄ ,(b+⍳d)∘.+1000×c+⍳e}¨p
+g←1E6/0 ⋄ g[⊃,/q]+←1 ⍝ grid
++/,1<g ⍝ part 1
+⊃⊃p/⍨{∧/1=g[⍵]}¨q ⍝ part 2