Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
[1,45,67,43,58,98,41,34,57]
Solution: [98,45,67,43,58,1,41,34,57]
Reason: 1 is the minimum element and 98 is the maximum element and their positions are swapped in the resulting list.

Now, solve this instance: [81, 11, 403, 239, 205, 314, 133, 225, 432, 493, 476, 322, 104, 145, 446, 117, 276, 252, 255, 434]
Student:
[81, 493, 403, 239, 205, 314, 133, 225, 432, 11, 476, 322, 104, 145, 446, 117, 276, 252, 255, 434]