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.

[23, 333, 423, 428, 337, 134, 388, 129, 293, 364, 92, 246, 275, 481, 361, 393, 375, 208, 279, 127]
[481, 333, 423, 428, 337, 134, 388, 129, 293, 364, 92, 246, 275, 23, 361, 393, 375, 208, 279, 127]

[15, 100, 389, 471, 129, 112, 68, 70, 423, 81, 481, 334, 67, 80, 277, 93, 387, 391, 161, 434]
[481, 100, 389, 471, 129, 112, 68, 70, 423, 81, 15, 334, 67, 80, 277, 93, 387, 391, 161, 434]

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

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