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feat: add day 2
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# - Day 2 -
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# - Day 2: Cube Conundrum -
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Source: <https://adventofcode.com/2023/day/2>
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## Instructions - Part 1
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You're launched high into the atmosphere! The apex of your trajectory just barely reaches the surface of a large island floating in the sky. You gently land in a fluffy pile of leaves. It's quite cold, but you don't see much snow. An Elf runs over to greet you.
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The Elf explains that you've arrived at **Snow Island** and apologizes for the lack of snow. He'll be happy to explain the situation, but it's a bit of a walk, so you have some time. They don't get many visitors up here; would you like to play a game in the meantime?
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As you walk, the Elf shows you a small bag and some cubes which are either red, green, or blue. Each time you play this game, he will hide a secret number of cubes of each color in the bag, and your goal is to figure out information about the number of cubes.
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To get information, once a bag has been loaded with cubes, the Elf will reach into the bag, grab a handful of random cubes, show them to you, and then put them back in the bag. He'll do this a few times per game.
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You play several games and record the information from each game (your puzzle input). Each game is listed with its ID number (like the `11` in `Game 11: ...`) followed by a semicolon-separated list of subsets of cubes that were revealed from the bag (like `3 red, 5 green, 4 blue`).
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For example, the record of a few games might look like this:
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```txt
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Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
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Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
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Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
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Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
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Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
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```
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In game 1, three sets of cubes are revealed from the bag (and then put back again). The first set is 3 blue cubes and 4 red cubes; the second set is 1 red cube, 2 green cubes, and 6 blue cubes; the third set is only 2 green cubes.
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The Elf would first like to know which games would have been possible if the bag contained **only 12 red cubes, 13 green cubes, and 14 blue cubes**?
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In the example above, games 1, 2, and 5 would have been **possible** if the bag had been loaded with that configuration. However, game 3 would have been **impossible** because at one point the Elf showed you 20 red cubes at once; similarly, game 4 would also have been **impossible** because the Elf showed you 15 blue cubes at once. If you add up the IDs of the games that would have been possible, you get 8.
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Determine which games would have been possible if the bag had been loaded with only 12 red cubes, 13 green cubes, and 14 blue cubes. **What is the sum of the IDs of those games?**
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To begin, [get your puzzle input](./input.txt).
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Your puzzle answer was `2617`.
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**The first half of this puzzle is complete! It provides one gold star: `*`.**
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## Instructions - Part 2
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The Elf says they've stopped producing snow because they aren't getting any **water**! He isn't sure why the water stopped; however, he can show you how to get to the water source to check it out for yourself. It's just up ahead!
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As you continue your walk, the Elf poses a second question: in each game you played, what is the **fewest number of cubes of each color** that could have been in the bag to make the game possible?
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Again consider the example games from earlier:
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```txt
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Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
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Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
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Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
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Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
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Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
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```
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- In game 1, the game could have been played with as few as 4 red, 2 green, and 6 blue cubes. If any color had even one fewer cube, the game would have been impossible.
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- Game 2 could have been played with a minimum of 1 red, 3 green, and 4 blue cubes.
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- Game 3 must have been played with at least 20 red, 13 green, and 6 blue cubes.
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- Game 4 required at least 14 red, 3 green, and 15 blue cubes.
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- Game 5 needed no fewer than 6 red, 3 green, and 2 blue cubes in the bag.
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The **power** of a set of cubes is equal to the numbers of red, green, and blue cubes multiplied together. The power of the minimum set of cubes in game 1 is `48`. In games 2-5 it was `12`, `1560`, `630`, and `36`, respectively. Adding up these five powers produces the sum **`2286`**.
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For each game, find the minimum set of cubes that must have been present. **What is the sum of the power of these sets?**
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Your puzzle answer was `59795`.
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**Both parts of this puzzle are complete! They provide two gold stars: `**`.**
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100
day_2/input.txt
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100
day_2/input.txt
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Game 1: 5 red, 1 green, 2 blue; 2 green, 8 blue, 6 red; 8 red, 3 blue, 2 green; 6 red, 1 green, 19 blue; 1 red, 17 blue
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Game 2: 4 red, 5 green, 2 blue; 7 red, 14 green, 3 blue; 2 green, 5 blue, 11 red; 10 blue, 3 green; 9 green, 6 blue, 13 red; 7 red, 5 green, 9 blue
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Game 3: 9 green, 18 blue, 1 red; 6 red, 10 blue, 5 green; 4 blue, 4 red, 15 green
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Game 4: 1 red, 13 green; 10 green, 2 red; 3 red, 4 green, 2 blue
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Game 5: 4 red, 2 green, 1 blue; 4 red, 9 blue; 4 green, 1 red, 6 blue; 3 blue, 2 green, 6 red; 5 red, 4 green, 1 blue
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Game 6: 6 red, 3 green, 6 blue; 3 green, 5 blue, 12 red; 3 green, 9 blue, 3 red; 13 red, 8 blue
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Game 7: 3 blue, 1 red; 3 blue, 10 green; 4 green, 5 blue
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Game 8: 11 green, 4 blue; 4 red, 4 blue, 11 green; 4 green, 3 blue; 1 blue, 6 red, 12 green
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Game 9: 1 blue, 4 green, 1 red; 5 green, 3 blue; 9 green, 4 blue; 3 blue, 1 red, 10 green; 6 green, 2 blue
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Game 10: 5 green, 6 red, 7 blue; 7 green, 5 blue, 5 red; 8 red, 6 blue, 8 green; 2 blue, 8 green, 6 red; 6 blue, 8 red, 4 green
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Game 11: 1 blue, 10 red, 10 green; 11 green, 2 blue, 16 red; 4 blue, 7 red, 14 green
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Game 12: 8 green, 9 red, 12 blue; 2 green, 4 blue, 7 red; 1 red, 9 blue, 7 green; 8 green, 2 red, 10 blue; 1 green, 5 red, 5 blue; 6 green, 5 red, 1 blue
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Game 13: 3 green, 1 blue, 6 red; 1 green, 10 red; 1 blue, 15 red, 2 green
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Game 14: 2 green, 6 blue; 1 green, 2 blue, 2 red; 5 blue, 1 green, 2 red; 4 green, 5 blue, 4 red; 4 red, 5 green, 4 blue; 1 red, 5 green, 6 blue
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Game 15: 12 green, 7 blue; 19 green; 11 blue, 16 green, 1 red; 1 red, 2 green, 3 blue; 8 blue, 1 red, 19 green; 14 blue, 3 green, 1 red
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Game 16: 2 green, 13 blue, 3 red; 5 red, 12 blue; 6 blue, 8 red; 4 red, 1 green, 4 blue; 1 green, 15 blue; 4 blue, 2 green, 1 red
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Game 17: 11 blue, 7 green, 2 red; 12 red, 8 green, 8 blue; 2 red, 6 blue, 6 green
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Game 18: 1 green, 2 blue; 2 green, 1 blue, 4 red; 3 green, 16 red; 2 red, 3 green
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Game 19: 11 blue, 3 green, 3 red; 11 blue, 5 green; 3 green, 3 red, 8 blue
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Game 20: 1 green, 6 blue; 4 blue, 6 green; 1 red, 10 green; 12 green; 5 blue, 1 red, 4 green; 1 green, 5 blue
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Game 21: 7 green, 3 blue; 1 red, 5 blue, 6 green; 1 red, 11 green; 8 blue, 1 red, 10 green; 1 red, 5 blue, 3 green
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Game 22: 3 red, 1 blue; 3 green, 1 red, 1 blue; 7 green, 2 blue
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Game 23: 12 green, 1 red, 2 blue; 10 blue, 1 green, 1 red; 9 blue, 8 green
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Game 24: 5 blue, 6 green, 6 red; 3 blue, 1 red; 8 blue, 2 green, 12 red; 1 green, 2 blue, 14 red; 2 blue, 5 green, 15 red
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Game 25: 6 red, 13 green; 1 blue, 1 red, 3 green; 1 blue, 12 red, 10 green
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Game 26: 16 red, 2 blue, 7 green; 1 blue, 7 green, 8 red; 1 blue, 3 red, 9 green
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Game 27: 4 blue, 15 green; 6 green, 2 blue, 1 red; 9 blue, 10 green, 4 red; 3 red, 3 green, 6 blue; 11 blue, 7 red, 11 green; 6 red, 5 green, 13 blue
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Game 28: 10 blue, 8 red, 10 green; 4 blue, 11 red, 6 green; 8 red, 9 green, 10 blue; 4 red, 9 green, 2 blue
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Game 29: 4 red, 9 green, 7 blue; 10 blue, 6 green, 4 red; 1 green, 2 red, 10 blue; 3 green, 9 blue
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Game 30: 6 blue, 9 green, 10 red; 6 blue, 4 red; 5 green, 2 blue; 5 green, 2 red, 2 blue; 6 blue, 8 green
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Game 31: 7 blue; 2 green, 6 blue; 1 red, 9 blue, 5 green
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Game 32: 8 blue, 2 red, 4 green; 6 red, 2 blue, 1 green; 14 blue, 8 green, 8 red
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Game 33: 1 green, 1 red, 1 blue; 2 blue, 1 green, 12 red; 1 green, 1 red; 1 blue, 2 red, 1 green; 7 red, 2 green, 2 blue
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Game 34: 3 blue; 2 blue; 10 red, 1 blue, 1 green; 5 red; 1 green, 1 red, 1 blue; 1 green, 2 red
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Game 35: 10 green, 1 red, 16 blue; 4 red, 10 blue, 9 green; 1 green, 7 blue, 5 red
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Game 36: 1 blue, 3 red, 16 green; 1 blue, 3 red, 1 green; 9 green, 3 red, 8 blue; 14 green, 6 blue, 3 red; 3 red, 12 green, 4 blue
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Game 37: 11 red, 3 blue; 15 red, 8 blue, 6 green; 6 green, 19 red, 11 blue; 1 green, 4 blue, 14 red; 12 blue, 5 red, 8 green; 4 blue, 9 red
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Game 38: 4 green, 10 blue, 3 red; 1 green, 1 red, 11 blue; 2 red, 12 blue
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Game 39: 3 green, 1 red, 4 blue; 9 green, 1 red, 18 blue; 4 red, 4 green, 17 blue; 4 red, 10 blue, 14 green
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Game 40: 5 red, 4 green, 8 blue; 1 green, 9 blue; 9 blue, 3 red, 6 green; 8 red, 9 blue, 9 green
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Game 41: 1 blue, 9 red, 3 green; 9 red, 10 green, 15 blue; 13 red, 8 green, 8 blue; 19 red, 6 blue, 2 green; 7 green, 5 blue, 12 red
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Game 42: 15 blue; 1 red, 1 green, 9 blue; 6 blue, 1 red; 1 green, 4 blue
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Game 43: 1 green, 8 blue, 2 red; 1 red, 1 green, 6 blue; 7 blue; 7 blue, 3 red, 1 green; 2 red, 5 blue
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Game 44: 7 green, 11 blue, 6 red; 9 green, 8 blue; 4 red, 15 green; 12 green, 14 blue, 8 red
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Game 45: 4 red, 4 green; 14 green; 4 green, 2 blue; 1 blue, 12 red, 5 green; 3 red, 6 green; 11 red, 1 green
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Game 46: 2 blue, 1 green, 1 red; 1 blue, 6 green, 1 red; 2 blue, 1 red, 1 green; 5 green
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Game 47: 1 blue, 1 red; 14 red; 3 green, 2 blue, 17 red; 4 green
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Game 48: 1 red, 11 green, 2 blue; 1 red, 11 green, 6 blue; 13 green, 1 blue, 3 red; 3 green, 4 red, 6 blue; 12 green, 5 blue, 1 red; 2 red, 4 green, 4 blue
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Game 49: 5 blue, 3 green; 2 green, 8 blue; 5 blue; 4 green, 5 blue, 1 red; 4 green, 7 blue; 1 green, 3 blue
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Game 50: 3 red, 5 green, 2 blue; 9 green, 7 red, 4 blue; 3 blue, 6 red, 13 green; 6 blue, 8 red, 9 green
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Game 51: 2 green, 11 red, 7 blue; 5 blue, 13 red; 1 green, 2 blue, 3 red; 6 blue, 8 red; 11 red, 2 green, 4 blue
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Game 52: 15 blue, 1 green, 4 red; 4 green, 10 blue, 2 red; 6 red, 18 blue, 1 green
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Game 53: 2 red, 10 green, 6 blue; 4 green, 3 blue, 3 red; 17 blue, 19 green, 5 red; 6 blue, 6 green, 9 red; 5 blue, 17 green, 7 red
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Game 54: 9 blue, 8 red, 6 green; 6 red, 8 green; 1 green, 6 blue, 1 red; 5 red, 4 green, 9 blue; 5 blue, 2 green, 5 red
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Game 55: 8 blue, 8 red, 10 green; 3 red, 4 green, 9 blue; 4 red, 3 green, 7 blue
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Game 56: 3 red, 6 green, 1 blue; 5 green, 1 blue, 1 red; 1 red, 2 green; 10 green
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Game 57: 1 green, 4 blue, 12 red; 17 red, 7 blue, 10 green; 17 red, 5 blue, 3 green
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Game 58: 1 red, 5 green, 14 blue; 5 green, 6 red, 7 blue; 4 blue, 8 green; 3 red, 9 green, 7 blue; 8 blue, 8 green, 6 red; 8 green, 7 blue, 5 red
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Game 59: 3 green, 5 red; 2 red, 13 green, 1 blue; 19 green, 1 red, 1 blue; 19 green, 1 blue; 18 green, 1 blue, 5 red; 6 red, 9 green
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Game 60: 5 red, 1 green, 6 blue; 8 red, 6 blue, 14 green; 8 green, 8 red, 3 blue; 2 blue, 5 green, 3 red; 4 blue, 1 red, 14 green
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Game 61: 7 red, 4 blue, 2 green; 2 green, 8 red, 9 blue; 5 blue, 2 green, 8 red; 8 red, 1 green, 8 blue
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Game 62: 6 red, 3 blue; 1 blue, 2 red, 2 green; 3 red, 1 blue
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Game 63: 2 red, 1 blue, 2 green; 1 blue, 1 green; 2 green, 4 red; 3 green, 2 red; 2 green
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Game 64: 5 green, 6 blue, 7 red; 2 red, 5 green, 8 blue; 7 green, 9 blue, 1 red; 4 green, 5 blue; 19 blue, 5 green, 13 red
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Game 65: 3 red, 1 blue, 4 green; 5 green, 3 blue; 9 green, 1 red, 10 blue
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Game 66: 6 red, 13 green, 2 blue; 2 blue, 5 red, 9 green; 18 red; 2 green, 1 blue, 1 red; 19 red, 10 green; 1 blue, 15 green, 13 red
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Game 67: 8 blue, 3 red; 1 red, 12 green, 7 blue; 4 red, 6 blue, 5 green; 11 green, 10 blue, 7 red; 5 red, 9 green, 14 blue
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Game 68: 1 red, 3 green; 10 blue, 1 red, 3 green; 1 green, 17 blue; 16 blue; 6 blue
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Game 69: 11 green, 5 blue, 8 red; 2 red, 5 green, 1 blue; 10 green, 2 blue; 11 green, 7 red, 4 blue
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Game 70: 2 green, 1 blue, 13 red; 16 green, 20 red, 4 blue; 10 red
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Game 71: 10 blue, 6 green, 7 red; 5 red, 5 green, 2 blue; 7 green, 4 red, 5 blue; 1 red, 8 blue; 5 red, 1 blue, 8 green; 5 blue, 1 red, 5 green
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Game 72: 2 red, 4 green; 2 green, 2 red, 1 blue; 3 blue, 3 green, 2 red; 2 green
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Game 73: 5 red, 19 blue; 12 blue, 4 green, 16 red; 14 red, 11 blue, 1 green
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Game 74: 2 red, 1 green, 9 blue; 5 blue, 1 green, 2 red; 2 green, 1 red, 13 blue; 2 green, 1 red, 3 blue
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Game 75: 7 blue, 1 red, 18 green; 17 green, 8 red, 13 blue; 15 blue, 4 red
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Game 76: 1 green, 12 red, 13 blue; 5 green, 11 blue, 12 red; 10 red, 1 green; 10 red, 2 blue; 5 red, 2 green; 2 green, 17 blue, 3 red
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Game 77: 2 blue, 1 red, 1 green; 7 red; 7 red, 3 blue, 2 green; 10 green, 1 red; 3 red, 7 blue, 6 green
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Game 78: 10 red, 2 blue, 2 green; 1 blue, 6 red, 4 green; 12 red, 8 green; 6 green, 8 red, 7 blue; 11 green, 5 blue, 6 red
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Game 79: 7 green, 5 red; 6 blue, 2 green, 15 red; 9 blue, 2 red, 12 green; 1 blue, 4 red, 10 green; 4 blue, 12 green, 11 red; 5 green, 3 red, 5 blue
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Game 80: 1 green, 13 blue, 2 red; 2 red, 1 green, 13 blue; 7 blue, 8 red
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Game 81: 1 green, 2 red, 11 blue; 5 red, 3 blue; 1 green, 1 red; 14 red, 1 green
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Game 82: 12 red, 3 blue, 8 green; 15 red, 9 blue, 8 green; 6 blue, 13 red, 8 green
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Game 83: 4 blue, 6 green, 3 red; 7 red, 2 blue, 9 green; 6 green, 3 red
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Game 84: 4 green; 3 red, 3 blue; 4 red, 1 blue, 2 green; 1 red, 5 green, 5 blue; 1 red, 5 blue, 3 green
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Game 85: 3 red, 4 blue, 15 green; 9 green; 2 red, 4 blue, 6 green; 1 red, 4 green, 7 blue; 3 red, 10 green, 9 blue; 1 red, 13 green, 3 blue
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Game 86: 8 red, 6 blue; 3 blue, 3 green, 15 red; 12 red, 6 green, 13 blue; 15 red, 6 green, 10 blue
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Game 87: 4 red, 4 blue; 6 red, 2 blue; 5 blue, 3 green; 4 blue, 2 red
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Game 88: 4 blue, 7 green; 2 blue, 7 green; 6 green, 4 blue; 1 red, 1 blue, 2 green; 11 green, 3 blue
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Game 89: 1 blue, 12 green, 11 red; 3 red, 7 blue, 1 green; 7 green, 8 red; 6 blue, 2 green, 3 red; 7 red, 8 green; 11 blue, 5 red, 12 green
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Game 90: 1 green, 12 red, 17 blue; 14 red, 17 blue, 9 green; 6 green, 9 red, 11 blue
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Game 91: 3 green, 14 blue; 2 blue, 2 green, 6 red; 1 red, 11 blue, 1 green; 3 green, 4 red, 20 blue; 6 red, 2 green, 3 blue; 10 blue, 12 red
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Game 92: 6 blue, 7 red; 2 blue, 4 red, 1 green; 4 red, 1 green, 3 blue; 2 red, 5 blue; 8 red, 6 blue; 1 green, 2 blue, 1 red
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Game 93: 4 blue, 1 green, 4 red; 8 red, 4 green, 4 blue; 2 blue, 9 red; 1 blue, 4 red; 4 blue, 2 green, 11 red
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Game 94: 5 blue, 1 green, 7 red; 1 green, 11 blue, 1 red; 1 green, 15 blue, 4 red
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Game 95: 1 red, 3 blue; 1 red, 1 green, 8 blue; 3 red, 1 green, 3 blue; 3 red, 6 blue; 6 blue
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Game 96: 4 green, 1 blue; 7 green, 3 red; 2 blue, 9 red, 16 green; 3 blue, 4 red, 11 green
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Game 97: 6 green, 8 blue; 1 blue, 1 green; 3 green, 4 blue; 8 blue, 5 green, 2 red
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Game 98: 18 blue, 6 green; 11 green, 3 blue, 7 red; 18 blue, 3 red, 7 green; 5 red, 5 green; 8 blue, 2 green, 11 red
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Game 99: 3 red, 2 green, 3 blue; 1 red, 4 green, 1 blue; 2 green, 18 red; 15 red, 1 blue; 2 blue, 9 red, 2 green; 17 red, 3 blue, 4 green
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Game 100: 9 blue, 8 red, 16 green; 3 red, 7 green, 8 blue; 1 green, 3 red, 12 blue; 3 green, 14 blue
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5
day_2/input_example_1.txt
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5
day_2/input_example_1.txt
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Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
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Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
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Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
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Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
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Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
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188
day_2/src/lib.rs
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188
day_2/src/lib.rs
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use std::str::FromStr;
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const NUMBER_OF_RED_CUBES_IN_THE_BAG: usize = 12;
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const NUMBER_OF_GREEN_CUBES_IN_THE_BAG: usize = 13;
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const NUMBER_OF_BLUE_CUBES_IN_THE_BAG: usize = 14;
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#[derive(Debug, Default, PartialEq)]
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pub struct NumberOfCubesOfEachColor {
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pub red: usize,
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pub green: usize,
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pub blue: usize,
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}
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impl FromStr for NumberOfCubesOfEachColor {
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type Err = &'static str;
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/// Parses a string `string` to return a value of [`NumberOfCubesOfEachColor`]
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///
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/// If parsing succeeds, return the value inside [`Ok`], otherwise
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/// when the string is ill-formatted return an error specific to the
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/// inside [`Err`].
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///
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/// # Examples
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///
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/// ```
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/// use std::str::FromStr;
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/// use day_2::NumberOfCubesOfEachColor;
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///
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/// let string = "3 blue, 4 red";
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/// let expected_result = NumberOfCubesOfEachColor {
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/// red: 4,
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/// green: 0,
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/// blue: 3,
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/// };
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/// let actual_result = NumberOfCubesOfEachColor::from_str(string).unwrap();
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///
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/// assert_eq!(actual_result, expected_result);
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/// ```
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fn from_str(string: &str) -> Result<Self, Self::Err> {
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let mut result = NumberOfCubesOfEachColor::default();
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let subsets = string.split(", ");
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for subset in subsets {
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let mut subset_splitted = subset.split_ascii_whitespace();
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let number: usize = subset_splitted.next().unwrap_or("0").parse().unwrap_or(0);
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let color = subset_splitted.next();
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if let Some(color) = color {
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match color {
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"red" => result.red = number,
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"blue" => result.blue = number,
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"green" => result.green = number,
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_ => {}
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}
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}
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}
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Ok(result)
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}
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}
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#[derive(Debug, Default, PartialEq)]
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pub struct Game {
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pub id: usize,
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pub subsets_of_cubes: Vec<NumberOfCubesOfEachColor>,
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}
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impl FromStr for Game {
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type Err = &'static str;
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/// Parses a string `string` to return a value of [`Game`]
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///
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/// If parsing succeeds, return the value inside [`Ok`], otherwise
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/// when the string is ill-formatted return an error specific to the
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/// inside [`Err`].
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///
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/// # Examples
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///
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/// ```
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/// use std::str::FromStr;
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/// use day_2::{Game, NumberOfCubesOfEachColor};
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///
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/// let string = "Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green";
|
||||
/// let expected_result = Game {
|
||||
/// id: 1,
|
||||
/// subsets_of_cubes: vec![
|
||||
/// NumberOfCubesOfEachColor {
|
||||
/// red: 4,
|
||||
/// green: 0,
|
||||
/// blue: 3,
|
||||
/// },
|
||||
/// NumberOfCubesOfEachColor {
|
||||
/// red: 1,
|
||||
/// green: 2,
|
||||
/// blue: 6,
|
||||
/// },
|
||||
/// NumberOfCubesOfEachColor {
|
||||
/// red: 0,
|
||||
/// green: 2,
|
||||
/// blue: 0,
|
||||
/// },
|
||||
/// ],
|
||||
/// };
|
||||
/// let actual_result = Game::from_str(string).unwrap();
|
||||
///
|
||||
/// assert_eq!(actual_result, expected_result);
|
||||
/// ```
|
||||
fn from_str(string: &str) -> Result<Self, Self::Err> {
|
||||
let mut result = Game::default();
|
||||
let mut parts = string.split(": ");
|
||||
result.id = parts
|
||||
.next()
|
||||
.unwrap_or("Game 1")
|
||||
.strip_prefix("Game ")
|
||||
.unwrap_or("1")
|
||||
.parse()
|
||||
.unwrap_or(1);
|
||||
result.subsets_of_cubes = parts
|
||||
.next()
|
||||
.unwrap_or("0 red, 0 green, 0 blue")
|
||||
.split("; ")
|
||||
.map(|string| {
|
||||
NumberOfCubesOfEachColor::from_str(string)
|
||||
.unwrap_or(NumberOfCubesOfEachColor::default())
|
||||
})
|
||||
.collect::<Vec<NumberOfCubesOfEachColor>>();
|
||||
Ok(result)
|
||||
}
|
||||
}
|
||||
|
||||
pub fn part_1(input: &str) -> usize {
|
||||
input
|
||||
.lines()
|
||||
.map(|line| Game::from_str(line).unwrap_or_default())
|
||||
.filter(|game| {
|
||||
game.subsets_of_cubes
|
||||
.iter()
|
||||
.all(|number_of_cubes_of_each_color| {
|
||||
number_of_cubes_of_each_color.red <= NUMBER_OF_RED_CUBES_IN_THE_BAG
|
||||
&& number_of_cubes_of_each_color.blue <= NUMBER_OF_BLUE_CUBES_IN_THE_BAG
|
||||
&& number_of_cubes_of_each_color.green <= NUMBER_OF_GREEN_CUBES_IN_THE_BAG
|
||||
})
|
||||
})
|
||||
.map(|game| game.id)
|
||||
.sum::<usize>()
|
||||
}
|
||||
|
||||
pub fn part_2(input: &str) -> usize {
|
||||
input
|
||||
.lines()
|
||||
.map(|line| {
|
||||
let game = Game::from_str(line).unwrap_or_default();
|
||||
let mut maximum_number_of_cubes_of_each_color = NumberOfCubesOfEachColor {
|
||||
red: 1,
|
||||
green: 1,
|
||||
blue: 1,
|
||||
};
|
||||
for number_of_cubes_of_each_color in game.subsets_of_cubes {
|
||||
if number_of_cubes_of_each_color.red > maximum_number_of_cubes_of_each_color.red {
|
||||
maximum_number_of_cubes_of_each_color.red = number_of_cubes_of_each_color.red;
|
||||
}
|
||||
if number_of_cubes_of_each_color.green > maximum_number_of_cubes_of_each_color.green
|
||||
{
|
||||
maximum_number_of_cubes_of_each_color.green =
|
||||
number_of_cubes_of_each_color.green;
|
||||
}
|
||||
if number_of_cubes_of_each_color.blue > maximum_number_of_cubes_of_each_color.blue {
|
||||
maximum_number_of_cubes_of_each_color.blue = number_of_cubes_of_each_color.blue;
|
||||
}
|
||||
}
|
||||
maximum_number_of_cubes_of_each_color.red
|
||||
* maximum_number_of_cubes_of_each_color.green
|
||||
* maximum_number_of_cubes_of_each_color.blue
|
||||
})
|
||||
.sum::<usize>()
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod day_2_tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_part_1_example() {
|
||||
assert_eq!(part_1(include_str!("../input_example_1.txt")), 8);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_part_2_example() {
|
||||
assert_eq!(part_2(include_str!("../input_example_1.txt")), 2286);
|
||||
}
|
||||
}
|
||||
@ -1,18 +1,8 @@
|
||||
fn part_1() -> i32 {
|
||||
142
|
||||
}
|
||||
use day_2::{part_1, part_2};
|
||||
|
||||
fn main() {
|
||||
println!("- Day 2: Title -");
|
||||
println!("Answer Part 1: {}", part_1());
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod day_2_tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_part_1_example() {
|
||||
assert_eq!(142, part_1());
|
||||
}
|
||||
let input = include_str!("../input.txt");
|
||||
println!("- Day 2: Cube Conundrum -");
|
||||
println!("Answer Part 1: {}", part_1(input));
|
||||
println!("Answer Part 2: {}", part_2(input));
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user