input: Write a python function to find the index of the maximum element in a list.
  assert findMaxElementIndex([1, 3, 7, 1, 4, 7, 0]) == 2
  assert findMaxElementIndex([10, 20, 30, 20, 10]) == 2
  assert findMaxElementIndex([5, 5, 5, 5, 5]) == 0
output: def findMaxElementIndex(lst):
      return lst.index(max(lst))