add 01, 02

.gitignore

@@ -0,0 +1 @@
+**/target

01/Cargo.lock

@@ -0,0 +1,14 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc"
+version = "0.1.0"
+
+[[package]]
+name = "aoc2024-01"
+version = "0.1.0"
+dependencies = [
+ "aoc",
+]

01/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "aoc2024-01"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+aoc = {version = "*", path = "../lib/aoc"}

01/example.txt

@@ -0,0 +1,7 @@
+two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen

01/src/main.rs

@@ -0,0 +1,117 @@
+use aoc::read_file;
+
+const NUMBERS_AS_DIGITS: [&str; 10] = [
+    "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
+];
+
+enum Direction {
+    Forward,
+    Reverse,
+}
+
+fn main() {
+    let content = read_file("a.txt");
+
+    part_a(&content);
+    part_b(&content);
+}
+
+fn part_a(content: &[String]) {
+    let mut sum = 0;
+    let mut line_value;
+
+    for line in content {
+        line_value = 0;
+
+        'inner: for ch in line.chars() {
+            if ch.is_ascii_digit() {
+                line_value += ch.to_digit(10).unwrap() * 10;
+                break 'inner;
+            }
+        }
+        'inner: for ch in line.chars().rev() {
+            if ch.is_ascii_digit() {
+                line_value += ch.to_digit(10).unwrap();
+                break 'inner;
+            }
+        }
+        sum += line_value;
+    }
+    println!("{sum}");
+}
+
+fn part_b(content: &[String]) {
+    let mut sum = 0;
+    let mut line_value;
+
+    for line in content {
+        line_value = 0;
+        let chars: Vec<_> = line.chars().collect();
+
+        'inner: for i in 0..chars.len() {
+            if chars[i].is_ascii_digit() {
+                line_value = chars[i].to_digit(10).unwrap();
+                break 'inner;
+            } else if let Some(digit) = contains_digit_as_string(&chars, i, Direction::Forward) {
+                line_value = digit;
+                break 'inner;
+            }
+        }
+
+        line_value *= 10;
+
+        'inner: for i in (0..chars.len()).rev() {
+            if chars[i].is_ascii_digit() {
+                line_value += chars[i].to_digit(10).unwrap();
+                break 'inner;
+            } else if let Some(digit) = contains_digit_as_string(&chars, i, Direction::Reverse) {
+                line_value += digit;
+                break 'inner;
+            }
+        }
+
+        sum += line_value;
+    }
+
+    println!("{sum}");
+}
+
+fn contains_digit_as_string(chars: &[char], start: usize, direction: Direction) -> Option<u32> {
+    match direction {
+        Direction::Forward => {
+            for possible_len in [3, 4, 5] {
+                let end = start + possible_len;
+                if end >= chars.len() {
+                    return None;
+                }
+
+                let s: String = chars.get(start..end).unwrap().iter().collect();
+
+                for (i, number) in NUMBERS_AS_DIGITS.iter().enumerate() {
+                    if *number == s {
+                        return Some(i as u32);
+                    }
+                }
+            }
+            None
+        }
+        Direction::Reverse => {
+            let end = start + 1;
+            for possible_len in [3, 4, 5] {
+                let (start, overflow) = end.overflowing_sub(possible_len);
+                if overflow {
+                    return None;
+                }
+
+                let s: String = chars.get(start..end).unwrap().iter().collect();
+
+                for (i, number) in NUMBERS_AS_DIGITS.iter().enumerate() {
+                    if *number == s {
+                        return Some(i as u32);
+                    }
+                }
+            }
+            None
+        }
+    }
+}

02/Cargo.lock

@@ -0,0 +1,30 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc"
+version = "0.1.0"
+
+[[package]]
+name = "aoc2024-02"
+version = "0.1.0"
+dependencies = [
+ "aoc",
+ "itertools",
+]
+
+[[package]]
+name = "either"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
+
+[[package]]
+name = "itertools"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba291022dbbd398a455acf126c1e341954079855bc60dfdda641363bd6922569"
+dependencies = [
+ "either",
+]

02/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "aoc2024-02"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+aoc = {version = "*", path = "../lib/aoc"}
+itertools = "0.12.1"

02/example.txt

@@ -0,0 +1,5 @@
+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

02/input.txt

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

02/src/main.rs

@@ -0,0 +1,110 @@
+use itertools::Itertools;
+
+use aoc::read_file;
+
+const RED: usize = 12;
+const GREEN: usize = 13;
+const BLUE: usize = 14;
+
+const SPLIT_CHARS: [char; 3] = [' ', ';', ','];
+
+fn main() {
+    let content = read_file("input.txt");
+
+    part_a(&content);
+    part_b(&content);
+}
+
+#[derive(Debug)]
+struct Draws {
+    pub red: usize,
+    pub green: usize,
+    pub blue: usize,
+}
+
+impl From<&str> for Draws {
+    fn from(value: &str) -> Self {
+        let mut red = 0;
+        let mut green = 0;
+        let mut blue = 0;
+
+        let parts: Vec<_> = value
+            .split(&SPLIT_CHARS)
+            .filter(|w| !w.is_empty())
+            .tuples::<(&str, &str)>()
+            .collect();
+
+        for (count, color) in parts {
+            let count = count.parse().unwrap();
+            match color {
+                "red" => red = count,
+                "green" => green = count,
+                "blue" => blue = count,
+                _ => panic!("what color is that"),
+            };
+        }
+
+        Self::new(red, green, blue)
+    }
+}
+
+impl Draws {
+    fn new(red: usize, green: usize, blue: usize) -> Self {
+        Self { red, green, blue }
+    }
+
+    fn is_valid(&self, red: usize, green: usize, blue: usize) -> bool {
+        self.red <= red && self.green <= green && self.blue <= blue
+    }
+
+    fn power(&self) -> usize {
+        self.red * self.blue * self.green
+    }
+}
+
+fn part_a(content: &[String]) {
+    let mut sum = 0;
+
+    for line in content {
+        let id = get_id(line);
+        let draws = get_draws(line);
+        draws
+            .into_iter()
+            .all(|draw| draw.is_valid(RED, GREEN, BLUE))
+            .then(|| sum += id);
+    }
+
+    println!("{sum}");
+}
+
+fn get_draws(line: &str) -> Vec<Draws> {
+    let after_colon = line.split_once(": ").unwrap().1;
+    after_colon.split("; ").map(Draws::from).collect()
+}
+
+fn get_id(line: &str) -> usize {
+    let stripped_lead = line.strip_prefix("Game ").unwrap();
+    let (number, _) = stripped_lead.split_once(':').unwrap();
+    number.parse().unwrap()
+}
+
+fn part_b(content: &[String]) {
+    let mut sum = 0;
+
+    for line in content {
+        let draws = get_draws(line);
+        let minimum_cubes = draws.into_iter().reduce(compare_draws).unwrap();
+
+        sum += minimum_cubes.power();
+    }
+
+    println!("{sum}");
+}
+
+fn compare_draws(l: Draws, r: Draws) -> Draws {
+    let red = l.red.max(r.red);
+    let green = l.green.max(r.green);
+    let blue = l.blue.max(r.blue);
+
+    Draws::new(red, green, blue)
+}

lib/aoc/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc"
+version = "0.1.0"

lib/aoc/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "aoc"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

lib/aoc/src/lib.rs

@@ -0,0 +1,8 @@
+use std::{fs, io::Read};
+
+pub fn read_file(filename: &str) -> Vec<String> {
+    let mut f = fs::File::open(filename).unwrap();
+    let mut buffer = String::new();
+    f.read_to_string(&mut buffer).unwrap();
+    buffer.lines().map(|s| s.to_owned()).collect()
+}