Year 2023 Day 2

Author: maneatingape

Diff for: README.md

@@ -82,6 +82,7 @@ pie
 | Day | Problem | Solution | Benchmark (μs) |
 | --- | --- | --- | --: |
 | 1 | [Trebuchet?!](https://adventofcode.com/2023/day/1) | [Source](src/year2023/day01.rs) | 35 |
+| 2 | [Cube Conundrum](https://adventofcode.com/2023/day/2) | [Source](src/year2023/day02.rs) | 10 |
 
 ## 2022
 

Diff for: benches/benchmark.rs

@@ -222,4 +222,5 @@ mod year2022 {
 
 mod year2023 {
     benchmark!(year2023, day01);
+    benchmark!(year2023, day02);
 }

Diff for: input/year2023/day02.txt

@@ -0,0 +1,100 @@
+Game 1: 4 green, 7 blue; 2 blue, 4 red; 5 blue, 2 green, 2 red; 1 green, 3 red, 9 blue; 3 green, 9 blue; 7 green, 2 blue, 2 red
+Game 2: 1 blue, 2 red; 1 green, 2 blue, 1 red; 1 red, 5 green; 3 red, 2 blue, 8 green; 3 blue, 2 red, 4 green; 2 blue, 4 green, 3 red
+Game 3: 7 red, 7 blue, 9 green; 15 green, 4 red, 8 blue; 3 green, 12 blue, 6 red
+Game 4: 4 blue, 11 green, 6 red; 4 green, 2 red; 12 red, 1 blue, 3 green
+Game 5: 10 green, 4 blue, 9 red; 3 green, 15 blue, 11 red; 15 blue, 1 green, 2 red; 8 red, 8 blue, 5 green
+Game 6: 5 green, 19 red; 6 green, 13 red, 2 blue; 2 blue, 16 red, 4 green; 13 red, 9 blue, 5 green
+Game 7: 1 blue, 6 red, 6 green; 7 blue, 4 red; 6 green, 1 red, 11 blue; 3 green, 4 blue, 4 red; 6 green, 13 blue, 11 red
+Game 8: 8 green, 2 blue; 20 green, 1 red; 1 blue, 6 red, 6 green; 9 green
+Game 9: 5 red; 4 green, 3 red, 1 blue; 1 blue; 6 red, 1 blue, 9 green
+Game 10: 2 green, 3 red; 18 blue, 20 green, 9 red; 7 red, 9 blue, 17 green
+Game 11: 15 green, 7 blue, 9 red; 7 blue, 10 green, 7 red; 5 red, 3 blue, 10 green; 5 blue, 12 green; 14 green, 8 blue, 5 red; 7 blue, 2 red, 5 green
+Game 12: 3 green, 1 red, 8 blue; 9 blue, 3 red, 3 green; 4 blue, 1 green; 2 red, 3 green, 1 blue; 4 red, 7 blue, 3 green
+Game 13: 14 green, 1 red; 4 green; 2 green, 1 blue; 14 green; 13 green, 1 red, 1 blue; 1 blue, 1 red, 5 green
+Game 14: 1 blue, 6 red, 13 green; 5 red, 10 blue, 3 green; 19 green, 1 red, 14 blue; 4 red, 17 green, 9 blue; 12 green, 10 blue, 7 red
+Game 15: 10 red, 2 blue, 18 green; 17 green, 3 blue, 7 red; 18 blue, 8 red, 12 green; 6 blue, 6 green, 12 red
+Game 16: 14 blue, 5 green, 12 red; 7 green, 3 red, 9 blue; 4 green, 1 red, 8 blue; 9 red, 19 green, 12 blue; 12 blue, 7 red, 6 green; 5 blue, 3 green, 6 red
+Game 17: 1 green, 1 blue, 15 red; 1 blue, 3 green, 12 red; 9 blue, 2 green, 10 red
+Game 18: 12 red, 7 green, 7 blue; 3 blue, 8 red, 1 green; 2 green, 17 red
+Game 19: 1 red, 7 blue, 17 green; 11 red, 15 blue; 11 blue, 18 green; 6 blue, 14 green, 14 red; 16 blue, 8 red, 8 green; 17 green, 9 red, 1 blue
+Game 20: 11 green; 1 blue, 4 green, 7 red; 7 green; 3 red, 1 blue, 6 green
+Game 21: 18 blue, 6 green, 10 red; 12 blue; 9 blue, 2 green, 9 red; 9 red, 20 blue, 1 green; 8 blue, 6 red; 19 blue, 1 green, 4 red
+Game 22: 4 blue, 16 red, 3 green; 7 blue, 3 green, 12 red; 10 red, 7 green, 10 blue; 7 red, 11 blue, 4 green; 3 blue, 1 green, 16 red
+Game 23: 5 green, 8 red, 1 blue; 2 red, 5 blue, 3 green; 2 green, 17 blue, 4 red; 2 blue, 2 red; 7 red, 1 green, 14 blue; 4 red, 8 blue
+Game 24: 1 blue, 3 green, 1 red; 3 blue, 11 green, 15 red; 3 blue, 2 red, 12 green; 9 green, 6 red, 2 blue; 15 green, 12 red, 3 blue; 13 green, 1 blue, 13 red
+Game 25: 6 blue, 5 red, 10 green; 9 red, 3 blue, 3 green; 6 blue, 11 red, 15 green; 7 green, 10 red, 4 blue; 2 red, 20 blue, 11 green
+Game 26: 3 blue, 5 red, 10 green; 7 green, 6 red; 7 green, 1 red, 3 blue; 10 green, 4 red, 3 blue; 4 red, 7 green, 3 blue; 8 green, 4 red
+Game 27: 16 green, 6 blue, 4 red; 3 red, 6 blue, 7 green; 10 green; 6 green, 1 red
+Game 28: 5 green, 5 red, 2 blue; 1 blue, 9 red, 6 green; 2 blue, 3 red; 1 blue, 1 green, 5 red; 4 green, 3 red; 9 green, 1 blue, 14 red
+Game 29: 1 red, 2 green, 13 blue; 1 green, 2 red, 9 blue; 12 red; 3 blue, 5 red
+Game 30: 8 blue, 3 red, 9 green; 10 green, 9 blue; 9 green, 12 blue; 3 blue, 2 red, 4 green; 8 blue, 9 green; 1 red, 12 blue, 6 green
+Game 31: 8 red, 16 blue; 2 red, 1 green, 1 blue; 5 red, 8 blue, 1 green
+Game 32: 3 green, 5 blue, 8 red; 10 blue, 1 red, 3 green; 9 green, 3 blue, 2 red; 2 blue, 1 red, 14 green; 3 blue, 10 red, 16 green
+Game 33: 1 red, 3 green, 2 blue; 15 blue, 1 green; 1 green, 1 red, 10 blue
+Game 34: 4 green, 7 blue; 2 blue, 12 green; 6 red, 14 green, 7 blue
+Game 35: 9 blue, 1 green; 2 green, 6 blue, 11 red; 1 green, 10 red, 1 blue
+Game 36: 5 blue, 1 green, 2 red; 11 blue, 3 green, 5 red; 2 green, 14 blue, 2 red; 3 green, 5 blue, 5 red; 13 blue, 2 green, 5 red; 3 green
+Game 37: 4 blue, 2 red, 8 green; 1 blue, 9 green, 4 red; 1 red, 4 green, 1 blue; 16 green, 3 blue, 4 red
+Game 38: 9 blue, 9 green; 1 green, 3 blue; 8 blue, 6 red, 5 green; 1 green, 9 red, 1 blue
+Game 39: 1 red, 17 green; 1 blue, 7 green, 7 red; 6 red, 4 blue
+Game 40: 1 blue, 2 red; 10 blue, 4 green, 2 red; 1 green, 11 blue, 3 red; 4 blue, 2 green; 3 blue, 4 red
+Game 41: 7 red, 4 blue, 4 green; 10 red, 11 blue, 1 green; 6 red, 6 blue, 4 green; 13 blue, 3 red, 7 green; 9 green, 12 blue, 14 red; 9 blue, 12 red, 10 green
+Game 42: 3 blue, 1 red, 11 green; 4 blue, 9 green, 8 red; 3 red, 5 blue, 1 green
+Game 43: 2 green, 17 blue, 9 red; 16 red, 12 blue, 2 green; 12 red, 12 blue, 7 green; 17 red, 16 blue, 7 green
+Game 44: 2 red, 3 green, 5 blue; 5 red, 5 blue, 7 green; 2 red, 5 blue, 5 green; 6 red, 5 blue, 2 green
+Game 45: 9 green, 1 blue; 1 red, 5 green, 2 blue; 2 blue, 4 green, 9 red; 13 green, 7 red, 1 blue; 3 blue, 4 green
+Game 46: 5 green, 7 red; 8 green, 5 blue, 1 red; 1 blue, 7 red, 17 green
+Game 47: 1 green, 17 blue; 9 blue, 1 green; 1 blue, 1 red
+Game 48: 1 red, 6 green, 7 blue; 9 green, 1 red, 2 blue; 10 blue, 6 green, 1 red; 1 red, 4 green, 9 blue; 6 blue, 3 green, 1 red
+Game 49: 1 red, 1 blue, 16 green; 3 red, 1 green; 16 green; 2 blue, 8 red, 19 green; 20 green, 9 red; 8 green, 6 red
+Game 50: 1 green, 2 blue; 2 red, 3 blue; 4 red, 2 blue; 1 green; 3 blue; 3 blue, 2 green, 1 red
+Game 51: 6 blue, 5 green; 6 red, 5 green; 6 green, 6 blue, 16 red; 10 red, 10 green, 1 blue
+Game 52: 4 red, 5 green, 1 blue; 15 green, 1 blue; 8 green, 5 blue, 5 red; 4 blue, 11 green, 1 red
+Game 53: 5 green, 3 blue, 5 red; 2 red, 4 blue, 1 green; 1 red, 2 green; 11 red
+Game 54: 7 green, 16 blue, 5 red; 5 green; 10 blue, 6 green, 5 red; 3 green
+Game 55: 3 green; 16 green, 1 blue; 13 green, 19 blue, 1 red; 13 green, 18 blue
+Game 56: 9 green; 3 blue, 1 red, 10 green; 1 red, 4 blue, 9 green
+Game 57: 14 blue, 2 red, 3 green; 1 red, 8 blue, 7 green; 1 green, 3 red, 15 blue; 5 green, 12 blue; 4 green, 15 blue
+Game 58: 9 red, 5 green; 10 green, 11 red, 1 blue; 12 green, 17 red, 1 blue; 1 blue, 1 green, 17 red; 14 red, 1 blue, 16 green
+Game 59: 2 red, 12 blue, 10 green; 6 green, 1 red, 14 blue; 14 blue, 9 green, 2 red; 12 green, 14 blue, 2 red
+Game 60: 5 blue, 8 green; 1 red, 6 green, 7 blue; 1 blue
+Game 61: 5 red, 2 blue, 5 green; 2 blue, 11 green; 1 blue, 2 red, 14 green; 3 green; 4 red, 13 green; 2 blue, 6 green, 1 red
+Game 62: 1 red, 1 blue, 2 green; 3 red, 1 blue, 2 green; 1 blue, 10 red; 6 red, 1 blue
+Game 63: 7 red, 6 blue, 4 green; 2 blue, 5 green, 8 red; 5 blue, 4 green, 10 red; 4 blue, 7 red, 10 green; 5 blue, 10 green, 8 red; 4 blue, 10 green, 3 red
+Game 64: 6 red, 7 green, 15 blue; 8 blue, 16 green, 3 red; 11 green, 12 blue; 4 red, 17 blue, 8 green
+Game 65: 2 blue, 7 green; 2 red, 8 blue; 2 green, 1 red, 5 blue; 1 green, 2 blue; 19 green, 7 blue; 2 red, 3 blue, 14 green
+Game 66: 15 green, 7 blue; 9 blue, 3 green, 16 red; 1 red, 1 blue, 16 green; 18 red, 8 blue, 11 green
+Game 67: 1 blue, 1 green, 2 red; 5 green, 8 red, 2 blue; 7 red, 1 blue
+Game 68: 3 blue, 10 red; 13 red, 1 green; 5 blue, 5 red; 2 blue, 1 green, 16 red; 16 red, 3 blue
+Game 69: 7 red, 1 blue, 3 green; 14 green, 2 blue; 3 green, 2 blue; 4 red, 1 green, 1 blue; 10 red, 14 green, 2 blue
+Game 70: 10 green, 12 red; 5 red, 7 green; 1 blue, 6 red, 11 green
+Game 71: 16 green, 13 red, 10 blue; 7 red, 7 blue, 15 green; 17 green, 13 red, 1 blue; 5 blue, 8 green, 11 red; 7 red, 1 blue, 15 green; 15 green, 4 blue, 2 red
+Game 72: 3 blue, 3 red; 2 blue, 3 red, 1 green; 1 red, 1 blue, 3 green; 1 green, 2 blue, 3 red; 3 blue, 1 green, 1 red; 1 blue, 4 red
+Game 73: 10 blue, 11 red, 5 green; 6 green, 9 blue, 4 red; 10 red, 5 green, 9 blue
+Game 74: 6 green, 17 blue; 1 red, 1 blue, 11 green; 2 blue, 1 red, 3 green
+Game 75: 11 red, 11 green, 3 blue; 11 red, 1 blue, 6 green; 4 green, 3 blue, 8 red
+Game 76: 3 green, 3 blue, 12 red; 3 blue, 15 green, 3 red; 4 red, 15 green, 2 blue
+Game 77: 13 blue, 11 red, 1 green; 3 red, 12 green, 12 blue; 7 red, 15 green, 4 blue; 5 red, 2 green, 3 blue
+Game 78: 4 red, 8 blue, 2 green; 7 blue, 3 green, 7 red; 3 green, 13 blue; 3 red, 4 green
+Game 79: 7 blue, 13 red, 8 green; 7 green, 15 red, 9 blue; 2 green, 8 red, 10 blue; 13 blue, 20 red, 7 green; 11 red, 2 green, 14 blue
+Game 80: 12 red; 2 blue, 15 red, 3 green; 1 blue, 1 green, 2 red; 1 green; 1 green, 3 blue, 13 red; 1 green, 2 blue, 1 red
+Game 81: 11 blue; 6 blue, 8 green, 4 red; 7 blue, 1 red, 1 green
+Game 82: 9 blue, 1 red; 3 blue, 1 red, 3 green; 8 blue, 8 green, 2 red; 5 blue
+Game 83: 7 blue, 13 red; 4 blue, 2 green, 3 red; 15 blue, 9 red, 1 green; 14 red, 1 green, 12 blue
+Game 84: 8 blue, 1 green, 20 red; 9 green, 20 red, 18 blue; 16 red, 15 blue, 5 green; 15 red, 10 green, 16 blue; 11 green, 14 red, 12 blue
+Game 85: 1 red, 2 blue, 9 green; 13 green, 3 blue, 5 red; 1 green, 1 red, 3 blue; 8 green, 2 blue, 1 red
+Game 86: 10 red, 6 blue, 11 green; 1 red, 11 green; 7 blue, 6 red, 11 green
+Game 87: 14 red, 4 blue, 4 green; 14 red, 4 blue, 7 green; 12 red, 11 green, 5 blue; 5 blue, 12 red
+Game 88: 3 green, 4 blue, 11 red; 3 green, 4 blue, 3 red; 10 red, 3 green; 3 blue, 2 red, 2 green
+Game 89: 4 blue, 2 red, 3 green; 3 green, 7 red, 13 blue; 1 green, 6 blue
+Game 90: 7 red; 5 blue, 11 red, 8 green; 8 red, 3 green, 2 blue
+Game 91: 2 blue; 4 red; 2 blue, 4 green; 3 green, 1 blue, 1 red
+Game 92: 7 blue, 10 green; 9 green, 9 blue, 7 red; 6 green; 12 red, 1 blue, 4 green; 5 red, 1 green, 13 blue
+Game 93: 7 green, 6 red, 1 blue; 3 red, 6 green, 8 blue; 1 blue, 6 green; 6 red, 15 blue, 4 green; 10 blue, 2 green, 6 red; 3 green, 5 red, 6 blue
+Game 94: 5 red, 1 green, 15 blue; 1 blue, 6 red; 2 red, 6 blue, 2 green
+Game 95: 9 blue, 4 red, 17 green; 15 green, 9 red, 10 blue; 1 blue, 13 green, 12 red
+Game 96: 1 blue, 12 green, 1 red; 3 blue, 1 green, 5 red; 2 blue, 8 red, 10 green
+Game 97: 18 blue, 7 red, 11 green; 6 red, 3 blue, 14 green; 1 red, 13 blue, 4 green
+Game 98: 5 blue, 2 green, 8 red; 12 red; 13 red, 4 blue, 4 green; 7 red, 11 blue; 10 blue, 2 green, 2 red; 6 red, 12 blue
+Game 99: 4 green, 2 blue, 4 red; 9 blue, 11 red, 1 green; 5 green
+Game 100: 2 blue, 12 green; 6 green, 1 red, 12 blue; 1 green, 5 blue, 1 red; 1 red, 12 green, 6 blue; 16 blue, 3 green

Diff for: src/lib.rs

@@ -217,4 +217,5 @@ pub mod year2022 {
 /// # Restore global snow production
 pub mod year2023 {
     pub mod day01;
+    pub mod day02;
 }

Diff for: src/main.rs

@@ -281,5 +281,5 @@ fn year2022() -> Vec<Solution> {
 }
 
 fn year2023() -> Vec<Solution> {
-    vec![solution!(year2023, day01)]
+    vec![solution!(year2023, day01), solution!(year2023, day02)]
 }

Diff for: src/year2023/day02.rs

@@ -0,0 +1,40 @@
+//! # Cube Conundrum
+use crate::util::iter::*;
+use crate::util::parse::*;
+
+pub struct Game(u32, u32, u32);
+
+/// Parse each game into the maximum red, green and blue values.
+pub fn parse(input: &str) -> Vec<Game> {
+    input
+        .lines()
+        .map(|line| {
+            line.split_ascii_whitespace().chunk::<2>().skip(1).fold(
+                Game(0, 0, 0),
+                |Game(r, g, b), [amount, color]| {
+                    let amount = amount.unsigned();
+                    match color.as_bytes()[0] {
+                        b'r' => Game(r.max(amount), g, b),
+                        b'g' => Game(r, g.max(amount), b),
+                        b'b' => Game(r, g, b.max(amount)),
+                        _ => unreachable!(),
+                    }
+                },
+            )
+        })
+        .collect()
+}
+
+/// Sum the ids for all valid games.
+pub fn part1(input: &[Game]) -> usize {
+    input
+        .iter()
+        .enumerate()
+        .filter_map(|(id, &Game(r, g, b))| (r <= 12 && g <= 13 && b <= 14).then_some(id + 1))
+        .sum()
+}
+
+/// Sum the product of maximum red, green and blue values.
+pub fn part2(input: &[Game]) -> u32 {
+    input.iter().map(|Game(r, g, b)| r * g * b).sum()
+}

Diff for: tests/test.rs

@@ -215,4 +215,5 @@ mod year2022 {
 
 mod year2023 {
     mod day01_test;
+    mod day02_test;
 }

Diff for: tests/year2023/day02_test.rs

@@ -0,0 +1,20 @@
+use aoc::year2023::day02::*;
+
+const EXAMPLE: &str = "\
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green";
+
+#[test]
+fn part1_test() {
+    let input = parse(EXAMPLE);
+    assert_eq!(part1(&input), 8);
+}
+
+#[test]
+fn part2_test() {
+    let input = parse(EXAMPLE);
+    assert_eq!(part2(&input), 2286);
+}