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Data Structures for Coding Interviews in C++

Solution: Union and Intersection of Linked Lists — Hashing

Explore how to implement union and intersection operations on linked lists using hashing in C++. Understand the logic behind combining and extracting common elements, and analyze the time and space complexity involved. This lesson helps you develop efficient functions for linked list operations necessary for coding interviews.

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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:

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

  • ...