From 6935393e9c9841f7ae418b235b5c9e0f22418116 Mon Sep 17 00:00:00 2001
From: Nat Lasseter <user@4574.co.uk>
Date: Mon, 28 Oct 2019 22:59:09 +0000
Subject: day 18, part2. part2 is just another uninteresting now do it an
 impossible number of times type puzzle

---
 day18/Dockerfile |  7 +++++++
 day18/Makefile   | 17 +++++++++++++++++
 day18/entrypoint | 13 +++++++++++++
 day18/input      | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 day18/part1      | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 141 insertions(+)
 create mode 100644 day18/Dockerfile
 create mode 100644 day18/Makefile
 create mode 100755 day18/entrypoint
 create mode 100644 day18/input
 create mode 100755 day18/part1

diff --git a/day18/Dockerfile b/day18/Dockerfile
new file mode 100644
index 0000000..5e0a8b7
--- /dev/null
+++ b/day18/Dockerfile
@@ -0,0 +1,7 @@
+FROM ruby:2.5-slim
+
+WORKDIR /opt
+
+COPY . .
+
+ENTRYPOINT ["./entrypoint"]
diff --git a/day18/Makefile b/day18/Makefile
new file mode 100644
index 0000000..9978cb1
--- /dev/null
+++ b/day18/Makefile
@@ -0,0 +1,17 @@
+DAY = 18
+
+.PHONY: run clean push
+
+run: build
+	docker run -it --rm aoc2018day$(DAY)
+
+build: part* input
+	docker build -t aoc2018day$(DAY) .
+	touch build
+
+clean:
+	rm -f build
+
+push: build
+	docker tag aoc2018day$(DAY) advent.4574.co.uk/aoc2018day$(DAY)
+	docker push advent.4574.co.uk/aoc2018day$(DAY)
diff --git a/day18/entrypoint b/day18/entrypoint
new file mode 100755
index 0000000..8982d21
--- /dev/null
+++ b/day18/entrypoint
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if [ -x part1 ] ; then
+	echo -ne "Part 1:\n\t"
+	time ./part1 < input
+fi
+if [ -x part1 -a -x part2 ] ; then
+	echo
+fi
+if [ -x part2 ] ; then
+	echo -ne "Part 2:\n\t"
+	time ./part2 < input
+fi
diff --git a/day18/input b/day18/input
new file mode 100644
index 0000000..2343711
--- /dev/null
+++ b/day18/input
@@ -0,0 +1,50 @@
+.||....##....|#|#.....|||...|............|......#.
+#....|#|..#....#....|...#.||...||..|||#|..#..|.##.
+.#|##|.#.|#|..|||....#|..|....|.##.#||#.|.#|..|..|
+|...|#.|...#..|...|#.|.#...##....|.||#...|...|...#
+.....|..#||..........###...#.||.###.|..#|#||..|#..
+|||.|##...|.|||#......###....|#.#|...|.#..|.|.|##.
+.......|.####.||##|.##....#............||#..#..|..
+..#|.|....#..|...|||..|...............|.|#..|.||#.
+.||#.#||.|.|.#.#|....#.#|..|.|#|.|.....|.#...|#..#
+......#..|...#....||#.#.#|..#...#.|||||..|#....|#|
+#.#|..#|#||#|||..#...#.........|.|..#...|......|.#
+|....|#..|##.....|...||.#....#......#...|..|#|#..#
+.|##.|...|......##.##.........#.#..|.||........|..
+.#||#.#...|.|.|.#|.#..|.|#..|##.|..|#....##.||....
+...|..|.#........#.|###|.#|...||.#....|..#.....#|.
+........#.###..###.....#....#|#|...#||..|..|....#|
+.|...........||.|...#|..|#....#|.#..|#..|..|.|.|..
+#.#..|.|||....|.....#|#...##.#......|..|..#..#.#|#
+.#|.#.........|.....##|##.#.#...#|...........#|#..
+..##|.|.|.##|.##..|..|...#|#..|.....|.|.#...#...||
+.|||..#.#.|.|#......####.........#|.|.#|.|.|.#.|..
+|#...|.........#.##..|....|....#|...||.#.|...|#.|#
+##.|.#..|#|#|#.|#.|##|..#.|..##.#....##.#...#|.|..
+.||#..#.#....|.#.#..#|.|.#|##|#.#||....#....#...|.
+#...#...|.|||.....#.|.#|..#......#.#...#.#|...|#||
+...##...|.#.##..||..#|.....|....#.##.#.|..|.|#.#.|
+..#..|...#.|..#......||....#.#|..##|.#....#.|.|...
+||.....|..|##.....##......#|.......|##.|.#.|.#.|..
+#|.|...|.|#...|...........#......|......|...#|.#..
+#|###|..#.##.||..#....|####.#.......#|..|...|.....
+........#.|.........#..##.#.#...|.#.....|.|.#.#|#.
+.##.##.#.|#|..#.###|...#....|#.|#.#|#....#.|...|..
+||...#......|||..#.|.||.|.|#..........#...#.|.|..#
+|.....|..|....#|.#|.#...|#..|#|#..#.###.|.....#.#.
+..#...|#..#...|||..###.|#.|..|......|.||....#.....
+.##.#||..#....#.#.|..|.....#...|..#.|....#..##..||
+........#..............#.||.#........|.|...|.|....
+..#.#..##..|.|..|#....||#...|.#...#|..|##..|...##|
+......#|##..#..........#...||.#|.||.|..|..|....|.#
+##..|.##|..#|#|#.|....|.#|..|#.#...#..##|#.##|.|..
+|...#.|.#.#..|..|....|#||...#..#....#..#|.......#.
+....#.###.#.|.....#.|.#.#.#...|.#|#...#|.....|.##.
+#......#..#.|.....||.#..|....|...#|||....|..|#.|..
+..|.#|##...#.#..#|...|........||#.#.#||.|#.#|#...|
+...|.|.#...|.|.....###|#.##|.#.....#|..|#|#|#.|#|.
+.##..|#.#..#....|#....|..|.||.#|..|.|.|.|..#.#.|..
+.#..|.|##||...|......|...#..#|.#....#...#|||...||.
+.|#.#....|#.#|.|....||.||.##|#...#.||.#.......#|..
+#...||.....|.|...|||...||....#..#....||.|#.|...|#.
+...|#..||....|#..|....|...|.||#..||..#.|..##......
diff --git a/day18/part1 b/day18/part1
new file mode 100755
index 0000000..d17faed
--- /dev/null
+++ b/day18/part1
@@ -0,0 +1,54 @@
+#!/usr/bin/env ruby
+
+def adj(arr, r, c)
+  a = []
+
+  a << arr[r-1][c-1] if r > 0  && c > 0
+  a << arr[r-1][c  ] if r > 0
+  a << arr[r-1][c+1] if r > 0  && c < 49
+  a << arr[r  ][c-1] if           c > 0
+  a << arr[r  ][c+1] if           c < 49
+  a << arr[r+1][c-1] if r < 49 && c > 0
+  a << arr[r+1][c  ] if r < 49
+  a << arr[r+1][c+1] if r < 49 && c < 49
+
+  a
+end
+
+now = $stdin.readlines.map(&:strip).map{|x|x.split("")}
+nxt = []
+
+10.times do
+  50.times do |r|
+    nxtr = []
+    50.times do |c|
+      a = adj(now, r, c)
+      nxtr << case now[r][c]
+      when "."
+        if a.count("|") >= 3 then
+          "|"
+        else
+          "."
+        end
+      when "|"
+        if a.count("#") >= 3 then
+          "#"
+        else
+          "|"
+        end
+      when "#"
+        if a.count("#") > 0 && a.count("|") > 0 then
+          "#"
+        else
+          "."
+        end
+      end
+    end
+    nxt << nxtr
+  end
+
+  now = nxt
+  nxt = []
+end
+
+puts now.flatten.count("|") * now.flatten.count("#")
-- 
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