Advent of Code 2024: Day 1

day1.ts

const fs = require('node:fs');

const left: number[] = [], right: number[] = [];
const input = fs.readFileSync('input', {encoding: 'utf8'});
for (const line of input.split(/\n/)) {
  if (line === '') continue;
  const [l, r] = line.split(/\s+/);
  left.push(Number(l));
  right.push(Number(r));
}
left.sort();
right.sort();

const distance = left.reduce((dist, l, i) => dist + Math.abs(l - right[i]));
console.log(distance);