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 Input:
[97, 471, 102, 181, 390, 449, 261, 403, 413, 363, 26, 172, 113, 55, 74, 414, 422, 175, 433, 266]

Ex Output:
[97, 26, 102, 181, 390, 449, 261, 403, 413, 363, 471, 172, 113, 55, 74, 414, 422, 175, 433, 266]

Ex Input:
[349, 359, 358, 229, 353, 451, 233, 169, 397, 473, 420, 23, 371, 94, 96, 275, 113, 51, 178, 480]

Ex Output:
[349, 359, 358, 229, 353, 451, 233, 169, 397, 473, 420, 480, 371, 94, 96, 275, 113, 51, 178, 23]

Ex Input:
[128, 249, 389, 83, 380, 314, 51, 289, 383, 247, 133, 336, 391, 41, 312, 497, 306, 349, 255, 488]

Ex Output:
[128, 249, 389, 83, 380, 314, 51, 289, 383, 247, 133, 336, 391, 497, 312, 41, 306, 349, 255, 488]