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: [221, 493, 17, 466, 353, 191, 141, 343, 347, 247, 78, 110, 342, 228, 492, 392, 61, 106, 104, 113]
Output:
[221, 17, 493, 466, 353, 191, 141, 343, 347, 247, 78, 110, 342, 228, 492, 392, 61, 106, 104, 113]