function buildStaircase(n: number): number[][] {
  let arr = []
  let result = []
  let count = 0
  const totalNumbers = n * (n + 1) / 2;
  for(let i = 1; i <= totalNumbers; i++){
    if(arr.length < (count + 1)) arr.push(i)
    else {
      result.push(arr)
      arr = [i]
      count++
    }
  }
  result.push(arr)
  return result;
}

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