function isBalanced(brackets: string): boolean {
  let saved = []
  let opens = ['[', '{', '(']
  let compare = {'[':']','(':')','{':'}'}
  for(let bracket of brackets) {
    if(opens.includes(bracket)){
      saved.push(bracket)
    } else {
      let lastSaved = saved.pop()
      if (compare[lastSaved] !== bracket) return false
    }
  }
  return saved.length === 0
}

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