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.
Example: [1,2,3,4,5,7,34,25]
Example solution: 33
Example explanation: maximum element is 34 and minimum element is 1, range is equal to the difference between 34 and 1 which is 33.

Problem: [484, 249, 241, 189, 152, 391, 429, 275, 491, 132, 252, 56, 270, 408, 398, 167, 390, 256, 183, 120]

Solution: 435