Given two Linked Lists, create union and intersection lists that contain union and intersection of the elements present in the given lists. Order of elements in output lists doesn’t matter.
Input: List1: 10 -> 15 -> 4 ->20 lsit2: 8 -> 4 -> 2 -> 10 Output: Intersection List: 4 -> 10 Union List: 2 -> 8 -> 20 -> 4 -> 15 -> 10
Implementation: Following are the steps to be followed to get union and intersection lists. 1) Sort both Linked Lists using merge sort. This step takes O(mLogm) time. 2) Linearly scan both sorted lists to get the union and intersection. This step takes O(m + n) time.
Just like Method 1, This method also assumes that there are distinct elements in the lists.
First list is 4 10 11 15 20 Second list is 2 4 8 10 Intersection list is 10 4 Union list is 20 15 11 10 8 4 2
Time complexity of this method is O(m Log m + n Log n).
In the next post, Method-3 will be discussed i.e. using hashing.
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- Union and Intersection of two Linked Lists
- Union and Intersection of two linked lists | Set-3 (Hashing)
- Why Quick Sort preferred for Arrays and Merge Sort for Linked Lists?
- Merge Sort for Linked Lists
- Intersection of two Sorted Linked Lists
- Write a function to get the intersection point of two Linked Lists.
- Merge K sorted linked lists | Set 1
- Merge two sorted linked lists
- Merge k sorted linked lists | Set 2 (Using Min Heap)
- In-place Merge two linked lists without changing links of first list
- Merge two sorted linked lists such that merged list is in reverse order
- Iterative Merge Sort for Linked List
- Merge Sort for Doubly Linked List
- Union and Intersection of two sorted arrays