26 lines
681 B
JavaScript
26 lines
681 B
JavaScript
|
import fs from "fs";
|
||
|
|
/**
|
||
|
|
* Main function for Puzzle B
|
||
|
|
*
|
||
|
|
* @param {string} data - Puzzle input as a single string.
|
||
|
|
* @returns {Promise<string>} Equation to get the final result. Needs to be solved elsewhere.
|
||
|
|
*/
|
||
|
|
async function main(data) {
|
||
|
|
const input = data.split(/\r?\n/)[1];
|
||
|
|
const buses = input
|
||
|
|
.split(",")
|
||
|
|
.map((val) => parseInt(val))
|
||
|
|
.map((id, i) => (isNaN(id) ? null : `(t+${i}) mod ${id} == 0`))
|
||
|
|
.filter((val) => val !== null);
|
||
|
|
const eq = buses.join(" && ");
|
||
|
|
|
||
|
|
// Solve elsewhere
|
||
|
|
// WolframAlpha works
|
||
|
|
return eq;
|
||
|
|
}
|
||
|
|
|
||
|
|
fs.readFile("input", (err, data) => {
|
||
|
|
if (err) throw err;
|
||
|
|
main(data.toString()).then(console.log).catch(console.error);
|
||
|
|
});
|