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: [471, 130, 251, 75, 238, 301, 215, 65, 69, 217, 122, 203, 15, 279, 149, 368, 478, 225, 67, 403]
Output:
463