From ddd494cc1cae7160b5320867af0b436288bb2a5a Mon Sep 17 00:00:00 2001
From: Jay Foad <jay.foad@gmail.com>
Date: Mon, 3 Dec 2018 13:09:19 +0000
Subject: [PATCH] Day 3 faster.

---
 p3fast.dyalog | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 p3fast.dyalog

diff --git a/p3fast.dyalog b/p3fast.dyalog
new file mode 100644
index 0000000..edb0c53
--- /dev/null
+++ 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