2019: Day 19 Part 1

2019/day19/part1.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require_relative 'intcode'
+
+Cell = Struct.new(:x, :y)
+
+class Drone
+  def initialize(program, target)
+    @computer = Intcode::Computer.new(program.as_memory) { on_input }
+    @input_queue = [target.x, target.y]
+  end
+
+  def on_input
+    @input_queue.shift
+  end
+
+  def run
+    @computer.next_output
+  end
+end
+
+program = Intcode.read(File.join(__dir__, 'input'))
+
+affected = 0
+(0...50).each do |y|
+  (0...50).each do |x|
+    drone = Drone.new(program, Cell.new(x, y))
+    case drone.run
+    when 0
+      print '.'
+    when 1
+      print '#'
+      affected += 1
+    end
+  end
+  print "\n"
+end
+puts affected