AoC 2023 day 4

const fs = require("fs")
const performance = require("perf_hooks").performance
const eol = require("os").EOL

let startTime = performance.now()
let part1 = (part2 = 0)
let input = fs.readFileSync(__dirname + "/data.txt", "utf8").split(eol)

let games = input.map((item) => {
    return item
        .split(": ")[1]
        .split("| ")
        .map((nums) => {
            return nums.match(/\d+/g)
        })
})

let multiTable = Array(games.length).fill(1)
for (let i = 0; i < games.length; i++) {
    const filteredArray = games[i][1].filter((value) => games[i][0].includes(value))
    part1 += filteredArray.length > 0 ? 1 * Math.pow(2, filteredArray.length - 1) : 0
    for (let j = 0; j < filteredArray.length; j++) {
        multiTable[j + 1 + i] += ~~multiTable[i]
    }
}

part2 = multiTable.reduce((partialSum, a) => partialSum + a, 0)
let time = performance.now() - startTime
console.log(`Part 1: ${part1}\nPart 2: ${part2}\nTimer: ${time} ms`)