--- Day 13: Care Package ---

As you ponder the solitude of space and the ever-increasing three-hour roundtrip for messages
between you and Earth, you notice that the Space Mail Indicator Light is blinking.  To help keep you
sane, the Elves have sent you a care package.

It's a new game for the ship's arcade cabinet! Unfortunately, the arcade is all the way on the other
end of the ship. Surely, it won't be hard to build your own - the care package even comes with
schematics.

The arcade cabinet runs Intcode software like the game the Elves sent (your puzzle input). It has a
primitive screen capable of drawing square tiles on a grid.  The software draws tiles to the screen
with output instructions: every three output instructions specify the x position (distance from the
left), y position (distance from the top), and tile id. The tile id is interpreted as follows:


 - 0 is an empty tile.  No game object appears in this tile.

 - 1 is a wall tile.  Walls are indestructible barriers.

 - 2 is a block tile.  Blocks can be broken by the ball.

 - 3 is a horizontal paddle tile.  The paddle is indestructible.

 - 4 is a ball tile.  The ball moves diagonally and bounces off objects.


For example, a sequence of output values like 1,2,3,6,5,4 would draw a horizontal paddle tile (1
tile from the left and 2 tiles from the top) and a ball tile (6 tiles from the left and 5 tiles from
the top).

Start the game. How many block tiles are on the screen when the game exits?