Instructions: 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.
Input: [217, 60, 362, 379, 424, 219, 47, 248, 439, 478, 349, 251, 485, 127, 202, 226, 270, 402, 105, 467]
Output:
[217, 60, 362, 379, 424, 219, 485, 248, 439, 478, 349, 251, 47, 127, 202, 226, 270, 402, 105, 467]