AoC 2022 day 6

const fs = require('fs');

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

function getMessageStartIndex(length) {
    for (let i = 0; i < input.length; i++) {
        let sub = input.slice(i, i + length);
        if (new Set(sub).size == length) {
            return i + length;
        }
    }
}
part1 = getMessageStartIndex(4);
part2 = getMessageStartIndex(14);

time = new Date().getTime() - startTime

console.log(`Part 1: ${part1}\nPart 2: ${part2}\nTimer: ${time} ms`);