aoc21-06.ts

import { List } from "immutable";
import { Advent, int } from "advent";

const { compute, computeCheck } = await Advent({ day: 6 });

compute(async (input) => {
	let count = Array.from(new Array(9), () => 0);
	let init = input.tokens(/,/).map(int);

	for (let v of init) {
		count[v]++;
	}

	console.log(count);

	for (let i = 0; i < 256; i++) {
		let next = Array.from(new Array(9), () => 0);
		for (let j = 0; j < count.length; j++) {
			if (j === 0) {
				next[6] += count[j];
				next[8] += count[j];
			} else {
				next[j - 1] += count[j];
			}
		}
		count = next;
		console.log(count);
	}

	return count.reduce((a, b) => a + b, 0);
}, 2);

// computeCheck(async function* (input) {
// 	yield 0;
// });