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.
Q: [378, 396, 254, 444, 434, 114, 369, 100, 122, 360, 312, 385, 165, 387, 416, 321, 374, 341, 69, 76]
A: 
[378, 396, 254, 69, 434, 114, 369, 100, 122, 360, 312, 385, 165, 387, 416, 321, 374, 341, 444, 76]