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Data Structures for Coding Interviews in C++

Challenge: Union and Intersection of Linked Lists — Hashing

Explore how to create union and intersection functions for linked lists using hashing techniques. Understand how to combine two linked lists, eliminating duplicates for union, and find common elements for intersection. This lesson guides you through implementing these operations efficiently with integer data values.

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Statement

Given two linked lists as inputs containing integer values, implement the union and intersection functions for the linked lists. The order of elements in the output lists doesn’t matter.

Here’s how to 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:

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