Definition: 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: [174, 287, 437, 168, 125, 479, 31, 262, 301, 291, 102, 37, 152, 335, 325, 153, 248, 213, 233, 34]

[174, 287, 437, 168, 125, 31, 479, 262, 301, 291, 102, 37, 152, 335, 325, 153, 248, 213, 233, 34]