Day 11

1 files changed, 72 insertions, 0 deletions

diff --git a/day11/part2.rb b/day11/part2.rb
new file mode 100644
index 0000000..0be5a5c
--- /dev/null
+++ b/day11/part2.rb
@@ -0,0 +1,72 @@
+class Monkey
+  def initialize(items, op, test, iftrue, iffalse)
+    @items = items
+    @op = op
+    @test = test
+    @iftrue = iftrue
+    @iffalse = iffalse
+    @inspections = 0
+  end
+
+  attr_reader :items, :inspections
+
+  def <<(item)
+    @items << item
+  end
+
+  def turn(wl)
+    @inspections += @items.count
+    ret = []
+    until @items.empty?
+      old = @items.shift
+      new = eval(@op) % wl
+      ret << [(new % @test == 0 ? @iftrue : @iffalse), new]
+    end
+    ret
+  end
+end
+
+class Game
+  def initialize
+    @monkeys = []
+    @worry_limit = 1
+  end
+
+  attr_accessor :worry_limit
+
+  def <<(monkey)
+    @monkeys << monkey
+  end
+
+  def round
+    @monkeys.each do |monkey|
+      monkey.turn(@worry_limit).each do |tom, val|
+        @monkeys[tom] << val
+      end
+    end
+  end
+
+  def inspections
+    @monkeys.map(&:inspections)
+  end
+end
+
+lines = $stdin.readlines.map(&:strip).reject(&:empty?)
+
+game = Game.new
+wl = 1
+lines.each_slice(6) do |mkls|
+  items = mkls[1].scan(/\d+/).map(&:to_i)
+  op = mkls[2].split(" = ")[1]
+  test = mkls[3].scan(/\d+/)[0].to_i
+  wl *= test
+  ift = mkls[4].scan(/\d+/)[0].to_i
+  iff = mkls[5].scan(/\d+/)[0].to_i
+  game << Monkey.new(items, op, test, ift, iff)
+end
+game.worry_limit = wl
+
+10_000.times do |i|
+  game.round
+end
+puts game.inspections.max(2).inject(&:*)