From d0b988bb748038ec88b63d4d7ba0885be8221bed Mon Sep 17 00:00:00 2001
From: Leah Neukirchen <leah@vuxu.org>
Date: Wed, 5 Dec 2018 18:13:02 +0100
Subject: day03

---
 day03.rb | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 day03.rb

(limited to 'day03.rb')

diff --git a/day03.rb b/day03.rb
new file mode 100644
index 0000000..246d68b
--- /dev/null
+++ b/day03.rb
@@ -0,0 +1,29 @@
+d = []
+IO.foreach("day03") { |line|
+  l = line.split(/\s*[#@,:\nx]\s*/).map(&:to_i)
+  d << l[1..-1]
+}
+
+claims = d.map(&:first)
+
+require 'set'
+
+r = 0
+p = {}
+p2 = {}
+d.each { |id,l,t,w,h|
+  (l...l+w).each { |x|
+    (t...t+h).each { |y|
+      if p.include? [x,y]
+        p2[[x,y]] = true
+        claims.delete(p[[x,y]])
+        claims.delete(id)
+      else
+        p[[x,y]] = id
+      end
+    }
+  }
+}
+
+p p2.size
+puts claims
-- 
cgit 1.4.1