CS 304 Assignment 3: merge sort on doubly-linked list solution




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Using the class _DoublyLinkedBase from page 274 of lecture 8 notes as the linked list implementation,
implement mergesort on a doubly linked list.
Your mergesort function should accept an instance of type _DoublyLinkedBase, which you will construct
in main by repeatedly inserting random numbers into a _DoublyLinkedBase instance.
Once you have verified that your sorting algorithm is correct, test the algorithm on a range of list sizes
from 10 to 1000 in increments of 10 (n=10, n=20, n=30, n=40, … , n=1000).
Finally, implement merge sort in python that handles a python List (array type) as input, instead of
doubly linked list (can use my implementation on moodle). Compare the sorting times for mergesort on
the _DoublyLinkedBase vs the List implementation. Use python’s matplotlib plotting function to
generate a plot similar to what you see below, comparing mergesort on a _DoublyLinkedBase to
mergesort on a List:
*note – the above plot compares quicksort and mergesort, from input sizes of 1 to 100,000. You will
show something similar, but compare linked _DoublyLinkedBase mergesort to List mergesort on input
sizes of 10 to 1000.
Include your plot as a pdf file along with your source code. Comment on the efficiency of linked list vs
array implementation. Which is faster? Why?