AoC 2022 day 7

const fs = require('fs');
const eol = require('os').EOL;

const startTime = new Date().getTime();
let part1 = part2 = time = 0;
let input = fs.readFileSync(__dirname + "/data.txt", 'utf8').split(eol);

let dirSizes = [];
function parseInput(index) {
    let size = 0;
    for (index; index < input.length; index++) {
        const element = input[index].split(" ");
        if (element[2] == '..') {
            break;
        } else if (element[1] == 'cd') {
            let [dirSize, i] = parseInput(++index);
            size += dirSize;
            index = i;
        } else if (!isNaN(element[0])) {
            size += Number(element[0]);
        }
    }
    if (size < 100000) part1 += size;
    dirSizes.push(size)
    return [size, index];
}

let totalSize = parseInput(0)[0];
let sizeToDelete = 30000000 - (70000000 - totalSize);
part2 = Math.min(...dirSizes.sort((a, b) => a - b).filter(a => a > sizeToDelete));

time = new Date().getTime() - startTime
console.log(`Part 1: ${part1}\nPart 2: ${part2}\nTimer: ${time} ms`);