AoC 2022 day 11

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 + eol)

function solve(runs, p1 = true) {
    let supermod = 1
    let monkeys = input.map(item => {
        let data = item.split(eol)
        supermod *= +data[3].replace(/[^\d.]/g, '')
        return {
            count: 0,
            balls: data[1].split('  Starting items: ')[1].split(', ').map(Number),
            op: eval("old => " + data[2].split("  Operation: new = ")[1]),
            worry: +data[3].replace(/[^\d.]/g, ''),
            worryTrue: +data[4].replace(/[^\d.]/g, ''),
            worryFalse: +data[5].replace(/[^\d.]/g, '')
        }
    })
    while (runs--) {
        for (const monkey of monkeys) {
            while (monkey.balls.length) {
                let old = monkey.balls.pop()
                let worry = monkey.op(old)
                if (p1) worry = Math.floor(worry / 3)
                else worry %= supermod
                let throwTo = worry % monkey.worry == 0 ? monkey.worryTrue : monkey.worryFalse
                monkeys[throwTo].balls.push(worry)
                monkey.count++
            }
        }
    }
    monkeys.sort((a, b) => b.count - a.count)
    return monkeys[0].count * monkeys[1].count
}
part1 = solve(20)
part2 = solve(10000, false)
let time = performance.now() - startTime
console.log(`Part 1: ${part1}\nPart 2: ${part2}\nTimer: ${time} ms`)