AdventOfCode-ts-2023/2/2_1.ts

import { LoadInput } from "../common.ts";
import { ParseGameStrings, type Game, type Set } from "./2_common.ts";

const test = [
    "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",
];

const input = await LoadInput(2);

const parsedGames = ParseGameStrings(input);

/**
 * The target amount of each colored cube in a games bag
 * 
 * As reported by the elf, only games with the maximum amount of each
 * color of cube specified here are valid
 */
const maxCubes: Set = {
    red: 12,
    green: 13,
    blue: 14,
};

let sumOfValidIDs = 0;
for (const game of parsedGames) {
    if (ValidateGames(game, maxCubes)) {
        sumOfValidIDs += game.ID;
    }
}

console.log(`The sum of valid game ID's is: ${sumOfValidIDs}`);

/**
 * Validate whether a game was possible
 *
 * A game is only valid if none of the sets in the game played
 * contained more of than the target maximum for that color.
 *
 * @param {Game} gameToValidate A game to validate
 * @param {Set} targetMaximum The maximum of each color in a set required for a game to be valid
 */
function ValidateGames(gameToValidate: Game, targetMaximum: Set): boolean {
    for(const set of gameToValidate.Sets) {
        if (set.red > targetMaximum.red
            || set.green > targetMaximum.green
            || set.blue > targetMaximum.blue) { return false; }
    }

    return true;
}