Lecture 21 — Exercises¶
Solutions to the problems below must be sent to Submitty for
automatic scoring. A separate file must submitted for each problem.
Solutions must be submitted by 4 pm on Tuesday, December 5. Download
insert_sort_and_merge.zip from the course Piazza site.
insert_sort.pycontains an implementation of the insertion sort algorithm. It includes
merge.pycontains an implementation of the
mergefunction that is the heart of merge sort. We only consider
mergehere and not the full sort. Modify the merge function so that if the same value appears in both lists then only one copy of the value is in the final merged list. You may assume that each contains no duplicates. Work within the context of the merge function itself, meaning that you should not use a set and you should not use an extra list. You need to only change a few lines of code.
For example, if the two lists are
L1 = [ 2, 7, 9, 12, 17, 18, 22, 25 ] L2 = [ 1, 5, 6, 8, 13, 14, 15, 18, 19, 23, 25 ]
Then the result
merge(L1,L2)should be the list
[ 1, 2, 5, 6, 7, 8, 9, 12, 13, 14, 15, 17, 18, 19, 22, 23, 25 ]
Do not change the name of the function and do not change the name of the file. On Submitty we will run code that imports
merge.pyand calls the function
mergepassing two lists as arguments.