28 lines
730 B
JavaScript
28 lines
730 B
JavaScript
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import fs from "fs";
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/**
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* Main function for Puzzle A
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*
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* @param {string} data - Puzzle input as a single string.
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* @returns {Promise<number>} The ID of the earliest bus to take, multiplied by the minutes until then.
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*/
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async function main(data) {
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const lines = data.split(/\r?\n/);
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const earliest = parseInt(lines[0]);
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const buses = lines[1]
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.split(",")
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.map((val) => parseInt(val))
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.filter((num) => !isNaN(num));
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const departsAfter = buses
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.map((id) => [id, id - (earliest % id)])
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.sort((a, b) => a[1] - b[1]);
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return departsAfter[0][0] * departsAfter[0][1];
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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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