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.
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Question: [170, 498, 490, 349, 135, 345, 287, 182, 394, 23, 97, 14, 418, 274, 285, 78, 147, 215, 104, 387]

Answer: [170, 14, 490, 349, 135, 345, 287, 182, 394, 23, 97, 498, 418, 274, 285, 78, 147, 215, 104, 387]

Question: [331, 491, 492, 19, 382, 167, 316, 441, 341, 293, 137, 163, 311, 336, 442, 493, 77, 476, 121, 32]

Answer: [331, 491, 492, 493, 382, 167, 316, 441, 341, 293, 137, 163, 311, 336, 442, 19, 77, 476, 121, 32]

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]