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.
Q: [347, 362, 411, 393, 124, 247, 476, 248, 339, 363, 176, 401, 138, 388, 379, 291, 389, 455, 87, 263]
A:
[347, 362, 411, 393, 124, 247, 87, 248, 339, 363, 176, 401, 138, 388, 379, 291, 389, 455, 476, 263]