input: Write a function to find the maximum value in an unsorted list.
  assert find_max_unsorted([3, 5, 7, 2, 8]) == 8
  assert find_max_unsorted([10, 20, 5, 15, 30]) == 30
  assert find_max_unsorted([1, 2, 3, 4, 5]) == 5
output: def find_max_unsorted(lst):
      return max(lst)