function missingNumbers(numbers: number[], n: number): number[] {
  const nums = new Set(numbers);
  const missing = [];

  for (let i = 1; i <= n; i++) {
    if (nums.has(i)) continue;

    missing.push(i);
  }

  return missing;
}

// No modificar: necesario para evaluar el resultado.
export { missingNumbers };