function twoSum(numbers: number[], target: number): [number, number] {
  const history = new Map<number, number>()

  for (let i = 0; i < numbers.length; i++) {
    const rest = target - numbers[i]

    if (history.has(rest)) return [history.get(rest), i]

    history.set(numbers[i], i)
  }
}

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