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.

Example Input: [30, 193, 300, 72, 114, 416, 41, 196, 45, 473, 181, 337, 258, 51, 128, 444, 466, 266, 310, 413]
Example Output: [473, 193, 300, 72, 114, 416, 41, 196, 45, 30, 181, 337, 258, 51, 128, 444, 466, 266, 310, 413]

Example Input: [117, 339, 458, 196, 352, 486, 260, 72, 55, 238, 395, 455, 33, 118, 142, 408, 348, 70, 379, 233]
Example Output: [117, 339, 458, 196, 352, 33, 260, 72, 55, 238, 395, 455, 486, 118, 142, 408, 348, 70, 379, 233]

Example Input: [15, 294, 79, 413, 414, 445, 53, 123, 18, 459, 248, 142, 395, 351, 191, 317, 455, 358, 187, 473]
Example Output:
[473, 294, 79, 413, 414, 445, 53, 123, 18, 459, 248, 142, 395, 351, 191, 317, 455, 358, 187, 15]