function buildStaircase(n: number): number[][] {
  const matrix: number[][] = []

  let increasingNum: number = 1

  for (let i = 1; i <= n; i++) {
    const row: number[] = Array.from({ length: i }, () => increasingNum++)
    matrix.push(row)
  }

  return matrix;
}

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