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 Input: [136, 71, 264, 213, 168, 416, 435, 215, 465, 114, 325, 93, 306, 212, 183, 455, 123, 274, 87, 412]
Example Output: 394

Example Input: [82, 130, 118, 319, 455, 414, 88, 19, 426, 13, 174, 301, 279, 144, 29, 362, 402, 114, 240, 289]
Example Output: 442

Example Input: [258, 453, 485, 246, 242, 312, 327, 319, 171, 39, 288, 292, 81, 93, 189, 223, 467, 489, 95, 408]
Example Output:
450