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part 1 done!
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2023/day02/part1.ts
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2023/day02/part1.ts
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}
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export function answer(input: string): number {
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console.log(input);
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return 42;
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const games = input.split("\n").map(parseGame);
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const bag = { r: 12, g: 13, b: 14 };
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return games
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.filter((g) => isGamePossible(g, bag))
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.reduce((sum, g) => sum + g.id, 0);
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}
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function isGamePossible(g: Game, bag: Round): boolean {
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const colors: ColorShort[] = ["r", "g", "b"];
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return colors.every((c) => g.rounds.every((r: Round) => r[c] <= bag[c]));
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}
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type Game = { id: number; rounds: Round[] };
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type Round = Record<ColorShort, number>;
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type ColorShort = "r" | "g" | "b";
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type Color = "red" | "green" | "blue";
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function parseGame(l: string): Game {
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const id = parseInt(l.substring(4, l.indexOf(":")));
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return { id, rounds: parseRounds(l) };
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}
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function parseRounds(l: string): Round[] {
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return l
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.substring(l.indexOf(": ") + 1)
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.split("; ")
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.map(parseRound);
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}
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function parseRound(rStr: string): Round {
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const countForColor = (c: Color) =>
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parseInt(
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rStr
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.trim()
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.split(", ")
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.find((draw) => draw.endsWith(c))
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?.replace(` ${c}`, "") ?? "0",
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);
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return {
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r: countForColor("red"),
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b: countForColor("blue"),
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g: countForColor("green"),
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};
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}
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2023/day02/test.ts
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2023/day02/test.ts
···
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import * as p2 from "./part2.ts";
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Deno.test("part1", () => {
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const examples = ["abc", "def"].join("\n");
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assertEquals(p1.answer(examples), 42);
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const examples = [
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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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].join("\n");
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assertEquals(p1.answer(examples), 8);
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});
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Deno.test("part2", () => {