Solve 2015-20

README.md

@@ -41,7 +41,7 @@ All currently implemented puzzles run in 200ms or less.
 | 17  | No Such Thing as Too Much                                       | ❌     | ❌     |
 | 18  | Like a GIF For Your Yard                                        | ❌     | ❌     |
 | 19  | Medicine for Rudolph                                            | ❌     | ❌     |
-| 20  | Infinite Elves and Infinite Houses                              | ❌     | ❌     |
+| 20  | [Infinite Elves and Infinite Houses](puzzles/2015/2015-20/)     | ❌     | ❌     |
 | 21  | RPG Simulator 20XX                                              | ❌     | ❌     |
 | 22  | Wizard Simulator 20XX                                           | ❌     | ❌     |
 | 23  | Opening the Turing Lock                                         | ❌     | ❌     |

puzzles/2015/2015-20/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "puzzle-2015-20"
+edition = "2024"
+
+[dependencies]
+ornament.workspace = true

puzzles/2015/2015-20/input.txt

@@ -0,0 +1 @@
+33100000

puzzles/2015/2015-20/src/lib.rs

@@ -0,0 +1,15 @@
+mod part1;
+
+pub use part1::part_1;
+
+#[cfg(test)]
+mod tests {
+    const INPUT: &str = include_str!("../input.txt");
+
+    #[test]
+    fn part_1() {
+        use super::part_1;
+
+        assert_eq!(part_1(INPUT), 776160);
+    }
+}

puzzles/2015/2015-20/src/main.rs

@@ -0,0 +1,17 @@
+use ornament::{Puzzle, Solution};
+use puzzle_2015_20::part_1;
+
+fn main() {
+    Puzzle {
+        name: "Infinite Elves and Infinite Houses",
+        year: 2015,
+        day: 20,
+        part_1: |input| {
+            Solution::new(part_1, input, |answer| {
+                format!("{answer} is the lowest house number")
+            })
+        },
+        part_2: None,
+    }
+    .solve(include_str!("../input.txt"))
+}

puzzles/2015/2015-20/src/part1.rs

@@ -0,0 +1,3 @@
+pub fn part_1(input: &str) -> usize {
+    todo!()
+}