40 lines
2.9 KiB
Text
40 lines
2.9 KiB
Text
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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.
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It's a new game for the ship's [arcade cabinet](https://en.wikipedia.org/wiki/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.
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The arcade cabinet runs [Intcode](9) 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:
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* `0` is an *empty* tile. No game object appears in this tile.
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* `1` is a *wall* tile. Walls are indestructible barriers.
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* `2` is a *block* tile. Blocks can be broken by the ball.
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* `3` is a *horizontal paddle* tile. The paddle is indestructible.
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* `4` is a *ball* tile. The ball moves diagonally and bounces off objects.
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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).
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Start the game. *How many block tiles are on the screen when the game exits?*
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Your puzzle answer was `333`.
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\--- Part Two ---
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----------
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The game didn't run because you didn't put in any quarters. Unfortunately, you did not bring any quarters. Memory address `0` represents the number of quarters that have been inserted; set it to `2` to play for free.
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The arcade cabinet has a [joystick](https://en.wikipedia.org/wiki/Joystick) that can move left and right. The software reads the position of the joystick with input instructions:
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* If the joystick is in the *neutral position*, provide `0`.
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* If the joystick is *tilted to the left*, provide `-1`.
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* If the joystick is *tilted to the right*, provide `1`.
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The arcade cabinet also has a [segment display](https://en.wikipedia.org/wiki/Display_device#Segment_displays) capable of showing a single number that represents the player's current score. When three output instructions specify `X=-1, Y=0`, the third output instruction is not a tile; the value instead specifies the new score to show in the segment display. For example, a sequence of output values like `-1,0,12345` would show `12345` as the player's current score.
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Beat the game by breaking all the blocks. *What is your score after the last block is broken?*
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Your puzzle answer was `16539`.
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Both parts of this puzzle are complete! They provide two gold stars: \*\*
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At this point, you should [return to your Advent calendar](/2019) and try another puzzle.
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If you still want to see it, you can [get your puzzle input](13/input).
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