aoc24-01.mts

import { Advent, f, fm, chr, ord, isDigit } from "advent";
import { Set, Map } from "immutable";

const { compute, computeCheck } = await Advent({ day: 1 });

compute(2, async (input) => {
	const data = input.parse(f.nl(f.splitWs(f.int())));
	const arr1 = data.map((x) => x[0]);
	const arr2 = data.map((x) => x[1]);
	arr1.sort((a, b) => a - b);
	arr2.sort((a, b) => a - b);
	let ans = 0;

	for (let i = 0; i < arr1.length; i++) {
		// const a = arr1[i];
		// const b = arr2[i];
		// console.log(a, b, Math.abs(a - b));
		// ans += Math.abs(a - b);
		const x = arr2.filter((y) => y === arr1[i]).length;
		ans += arr1[i] * x;
	}

	return ans;
});