expeditaet/solutions/typescript/2019/01/src/p2.ts

Advent of Code Solutions

import { task } from '@alexaegis/advent-of-code-lib';
import packageJson from '../package.json';

const fuel = (mass: number): number => {
	const f = Math.max(Math.floor(mass / 3) - 2, 0);
	return f + (f > 0 ? fuel(f) : 0);
};

export const p2 = (input: string): number =>
	input
		.split(/\r?\n/)
		.filter((n) => !!n)
		.map((n) => fuel(Number.parseInt(n, 10)))
		.reduce((s, n) => s + n, 0);

await task(p2, packageJson.aoc); // 5097039 ~0.36ms