my solutions to advent of code
aylac.top
aoc
advent-of-code
1type Direction = "^" | "v" | "<" | ">";
2interface Location {
3 x: number;
4 y: number;
5}
6type World = Map<string, number>;
7type Turn = "Santa" | "Robo";
8
9function giveGift(world: World, location: Location) {
10 const locationString = JSON.stringify(location);
11 return world.set(locationString, (world.get(locationString) ?? 0) + 1);
12}
13
14function moveTo(location: Location, direction: Direction) {
15 if (direction === "^") {
16 location.y -= 1;
17 } else if (direction === "v") {
18 location.y += 1;
19 } else if (direction === "<") {
20 location.x -= 1;
21 } else if (direction === ">") {
22 location.x += 1;
23 }
24 return location;
25}
26
27const input = (await Bun.file("../input.txt").text())
28 .trim()
29 .split("") as Direction[];
30
31// the gleam one is so much better...
32// part 1
33{
34 const location: Location = { x: 0, y: 0 };
35 const world: World = new Map();
36 input.forEach((direction) => {
37 giveGift(world, location);
38 moveTo(location, direction);
39 });
40 console.log(world.size);
41}
42
43// part 2
44{
45 const santa_location: Location = { x: 0, y: 0 };
46 const robo_location: Location = { x: 0, y: 0 };
47 const world: World = new Map();
48 let turn: Turn = "Santa";
49 const location = () => (turn === "Santa" ? santa_location : robo_location);
50 input.forEach((direction) => {
51 giveGift(world, location());
52 moveTo(location(), direction);
53 turn = turn === "Santa" ? "Robo" : "Santa";
54 });
55 console.log(world.size);
56}