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: [236, 128, 64, 438, 241, 141, 256, 492, 68, 462, 192, 426, 48, 366, 13, 26, 385, 320, 324, 137]
Output:
479