Instructions: In this task, you are given a list of integers you need to calculate and return the range of the integers which is the difference between maximum and minimum element in the list.
Input: [23, 442, 30, 73, 109, 344, 108, 209, 125, 491, 439, 138, 423, 476, 282, 20, 163, 97, 286, 355]
Output:
471