In this task, you are given a list of unique integers you need to swap the positions of maximum and minimum element in the list and return the updated list.

[406, 12, 301, 282, 125, 192, 14, 52, 402, 112, 232, 270, 86, 169, 434, 69, 379, 200, 165, 263]
[406, 434, 301, 282, 125, 192, 14, 52, 402, 112, 232, 270, 86, 169, 12, 69, 379, 200, 165, 263]