input: Write a function to get the maximum element from a list of numbers.
  assert get_max_elem([1, 2, 3, 4, 5]) == 5
  assert get_max_elem([10, 20, 30, 40, 50]) == 50
  assert get_max_elem([-1, -2, -3, -4, -5]) == -1
output: def get_max_elem(numbers):
      return max(numbers)