30 lines
838 B
JavaScript
30 lines
838 B
JavaScript
import fs from "fs";
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/**
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* Main function for Puzzle B
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*
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* @param {string} data - Puzzle input as a single string.
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* @returns {number[]} List of Seat IDs missing from the puzzle input, ignoring the missing front and back seats.
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*/
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async function main(data) {
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const entries = data
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.split(/\r?\n/)
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.map((line) => line.replace(/[FL]/g, "0").replace(/[BR]/g, "1"))
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.map((line) => line.match(/^(?<y>[01]{7})(?<x>[01]{3})$/))
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.map((entry) => parseInt(entry[0], 2));
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/** @type {number[]} */
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let missing_seats = [];
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for (let id = Math.min(...entries); id < Math.max(...entries); id++) {
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if (!entries.includes(id)) {
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missing_seats.push(id);
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}
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}
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return missing_seats;
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}
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fs.readFile("input", (err, data) => {
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if (err) throw err;
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main(data.toString()).then(console.log).catch(console.error);
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});
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