AoC 2024 day 3

// Advent of Code 2024 - Day 3
const fs = require("fs")

const input = fs.readFileSync(__dirname + (process.argv.includes("--test") ? "/test.txt" : "/input.txt"), "utf8")

const parseInput = (rawInput) => {
    return rawInput.split("\n")
}

const part1 = (str) => {
    const regex = /mul\((\d{1,3}),(\d{1,3})\)/g

    let sum = 0
    let match

    while ((match = regex.exec(str)) !== null) {
        sum += parseInt(match[1]) * parseInt(match[2])
    }

    return sum
}

const part2 = (str) => {
    const regex = /do\(\)|don't\(\)|mul\((\d{1,3}),(\d{1,3})\)/g

    let enabled = true
    let sum = 0
    let match

    while ((match = regex.exec(str)) !== null) {
        if (match[0] === "do()") enabled = true
        else if (match[0] === "don't()") enabled = false
        else if (enabled) sum += parseInt(match[1]) * parseInt(match[2])
    }

    return sum
}

const data = parseInput(input)

console.time("Part 1 Time")
console.log("Part 1:", part1(data))
console.timeEnd("Part 1 Time")

console.time("Part 2 Time")
console.log("Part 2:", part2(data))
console.timeEnd("Part 2 Time")