Given the task definition and input, reply with output. 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.

[471, 416, 38, 475, 92, 200, 179, 165, 124, 194, 163, 55, 292, 161, 315, 177, 120, 91, 128, 29]

[471, 416, 38, 29, 92, 200, 179, 165, 124, 194, 163, 55, 292, 161, 315, 177, 120, 91, 128, 475]