Instructions: 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.
Input: [140, 445, 344, 121, 328, 36, 73, 139, 244, 416, 309, 192, 319, 134, 412, 93, 195, 355, 76, 279]
Output:
[140, 36, 344, 121, 328, 445, 73, 139, 244, 416, 309, 192, 319, 134, 412, 93, 195, 355, 76, 279]