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: [190, 136, 460, 107, 184, 48, 278, 318, 27, 308, 173, 333, 281, 253, 296, 396, 299, 90, 255, 301]
Example Output: [190, 136, 27, 107, 184, 48, 278, 318, 460, 308, 173, 333, 281, 253, 296, 396, 299, 90, 255, 301]

Example Input: [66, 42, 133, 89, 419, 355, 104, 212, 452, 198, 240, 102, 496, 199, 68, 415, 364, 88, 491, 465]
Example Output: [66, 496, 133, 89, 419, 355, 104, 212, 452, 198, 240, 102, 42, 199, 68, 415, 364, 88, 491, 465]

Example Input: [224, 386, 364, 432, 468, 46, 205, 257, 308, 388, 261, 73, 402, 291, 403, 165, 147, 276, 222, 111]
Example Output:
[224, 386, 364, 432, 46, 468, 205, 257, 308, 388, 261, 73, 402, 291, 403, 165, 147, 276, 222, 111]