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Data Structures for Coding Interviews in C++

Solution: Union and Intersection of Linked Lists

Explore methods to perform union and intersection on two linked lists by combining elements and extracting common nodes. Understand how to traverse, merge, remove duplicates, and build result lists while analyzing time and space complexity of these operations in C++.

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Statement

Given the heads of two linked lists, head1 and head2, as inputs. Implement the union and intersection functions for the linked lists. The order of elements in the output lists doesn’t matter.

Here’s how you will implement the functions:

  • UnionThis combines elements from two sets, removing duplicates, to form a new set with all unique elements from both original sets.: This function will take two linked lists as input and return a new linked list containing all the unique elements.

  • IntersectionThis identifies and collects elements that are common to both sets, excluding all others, to create a set of shared elements.: This function will take two linked lists as input and return all the common elements between them as a new linked list.

Constraints:

Let n be the number of nodes in both linked lists:

  • 0≤0 \leq n ≤5×102\leq 5 \times 10^2 ...