Definition: 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: [162, 32, 109, 191, 340, 80, 33, 310, 54, 100, 49, 93, 425, 156, 63, 155, 201, 426, 277, 64]
Output:
394