From e12436c99bb04897d6344b6351d0336e4c627573 Mon Sep 17 00:00:00 2001
From: Leah Neukirchen <leah@vuxu.org>
Date: Thu, 28 Nov 2019 17:38:10 +0100
Subject: add rest

---
 day22.rb | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 day22.rb

(limited to 'day22.rb')

diff --git a/day22.rb b/day22.rb
new file mode 100644
index 0000000..e1cb1a8
--- /dev/null
+++ b/day22.rb
@@ -0,0 +1,34 @@
+DEPTH = 11739
+TX, TY = 11, 718
+
+#DEPTH = 510
+#TX, TY = 10, 10
+
+$GI = {}
+def gi(x,y)
+  $GI[[x,y]] ||=
+  if (x == 0 && y == 0) || (x == TX && y == TY)
+    0
+  elsif y == 0
+    x * 16807
+  elsif x == 0
+    y * 48271
+  else
+    el(x-1,y) * el(x,y-1)
+  end
+end
+
+def el(x,y)
+  (gi(x,y) + DEPTH) % 20183
+end
+
+p gi(0,0)
+p el(1,1)
+
+p1 = 0
+(0..TX).each { |x|
+  (0..TY).each { |y|
+    p1 += el(x,y)%3
+  }
+}
+p p1  # 8735
-- 
cgit 1.4.1