input: Write a python function to count the number of elements above the average in a list.
  assert count_above_average([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) == 5
  assert count_above_average([10, 20, 30, 40, 50, 60, 70, 80, 90, 100]) == 5
  assert count_above_average([5, 5, 5, 5, 5, 5, 5, 5, 5, 5]) == 0
output: def count_above_average(lst):
      average = sum(lst) / len(lst)
      count = sum(1 for x in lst if x > average)
      return count