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: [301, 493, 469, 440, 276, 264, 17, 431, 381, 96, 463, 37, 67, 155, 87, 281, 89, 402, 25, 120]

Solution: 476