input: Write a python function to generate a random list of unique numbers from 0 to n-1.
  assert len(generate_random_list(10)) == 10
  assert len(set(generate_random_list(5))) == 5
  assert sorted(generate_random_list(3)) == [0, 1, 2]
output: import random
  
  def generate_random_list(n):
      return random.sample(range(n), n)