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.

[EX Q]: [357, 126, 185, 18, 459, 254, 454, 404, 377, 134, 445, 209, 135, 462, 251, 23, 270, 40, 302, 19]
[EX A]: [357, 126, 185, 462, 459, 254, 454, 404, 377, 134, 445, 209, 135, 18, 251, 23, 270, 40, 302, 19]

[EX Q]: [312, 141, 46, 17, 455, 129, 163, 108, 176, 446, 407, 149, 57, 221, 402, 208, 198, 228, 329, 64]
[EX A]: [312, 141, 46, 455, 17, 129, 163, 108, 176, 446, 407, 149, 57, 221, 402, 208, 198, 228, 329, 64]

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