instruction:
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.
question:
[477, 200, 377, 405, 450, 137, 333, 139, 195, 52, 445, 154, 61, 63, 441, 455, 308, 354, 19, 340]
answer:
[19, 200, 377, 405, 450, 137, 333, 139, 195, 52, 445, 154, 61, 63, 441, 455, 308, 354, 477, 340]

question:
[157, 298, 54, 206, 237, 485, 440, 282, 247, 450, 28, 280, 474, 496, 379, 390, 392, 217, 422, 165]
answer:
[157, 298, 54, 206, 237, 485, 440, 282, 247, 450, 496, 280, 474, 28, 379, 390, 392, 217, 422, 165]

question:
[101, 177, 83, 449, 133, 367, 185, 153, 340, 274, 445, 96, 173, 65, 417, 426, 310, 459, 446, 211]
answer:
[101, 177, 83, 449, 133, 367, 185, 153, 340, 274, 445, 96, 173, 459, 417, 426, 310, 65, 446, 211]