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: [252, 475, 445, 300, 124, 55, 432, 249, 190, 45, 144, 15, 463, 426, 239, 407, 339, 195, 133, 79]
Output:
460