Advent of Code 2023 Day Two

Here’s my solution to Day Two of Advent of Code.

Part 1

const testInput = `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 maxCubes = { red: 12, green: 13, blue: 14 };

function isCubeValid(cube) {
  for (let [color, currentMax] of Object.entries(maxCubes)) {
    if (cube.includes(color)) {
      const value = Number(cube.replace(color, "").trim());
      if (value > currentMax) return false;
    }
  }
  return true;
}

function isLineValid(line) {
  return line
    .split(":")[1]
    .trim()
    .replace(/;/g, ",")
    .split(",")
    .map(cube => cube.trim())
    .every(isCubeValid);
}

const total = input => {
  return input
    .split("\n")
    .map(line => isLineValid(line))
    .reduce((acc, curr, index) => {
      if (curr) {
        return acc + index + 1;
      }
      return acc;
    }, 0);
};

console.log(total(testInput)); // 8

Part 2

const testInput = `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`;

function parseLine(line) {
  const cubes = line
    .split(":")[1]
    .trim()
    .replace(/;/g, ",")
    .split(",")
    .map(cube => cube.trim());

  return cubes;
}

function getMinCubes(line) {
  let cubesCount = { red: 0, green: 0, blue: 0 };
  const cubes = parseLine(line);

  cubes.forEach(cube => {
    for (let [color, _] of Object.entries(maxCubes)) {
      if (cube.includes(color)) {
        const value = Number(cube.replace(color, "").trim());
        if (value > cubesCount[color]) {
          cubesCount[color] = value;
        }
      }
    }
  });

  return cubesCount;
}

const total = input => {
  return input
    .split("\n")
    .map(line => getMinCubes(line))
    .map(cubes => {
      return Object.values(cubes).reduce((acc, curr) => acc * curr, 1);
    })
    .reduce((acc, curr) => acc + curr, 0);
};

console.log(total(testInput)); //2286

Hopefully more tomorrow, if I can get to it.