part2.ts

import * as fs from 'fs';
const input = fs
	.readFileSync('input', 'utf8')
	.split('\n')
	.map((x: string) => ({ value: +x * 811589153 }));

const numbers = [...input];

for (let i = 0; i < 10; i++) {
	for (const move of input) {
		const prev = numbers.indexOf(move);
		numbers.splice(prev, 1);
		const next = (prev + move.value) % numbers.length;
		if (next === 0 && move.value !== 0) {
			// push to end instead if next index is 0
			numbers.push(move);
		} else {
			numbers.splice(next, 0, move);
		}
	}
}

const base = numbers.findIndex((x) => x.value === 0);
let coordinates =
	numbers[(base + 1000) % numbers.length].value +
	numbers[(base + 2000) % numbers.length].value +
	numbers[(base + 3000) % numbers.length].value;

console.log(coordinates);