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Data Structures for Coding Interviews in Java

Solution: Union and Intersection of Linked Lists

Understand how to combine and intersect two linked lists by implementing functions that handle duplicates and shared elements. Learn to merge lists for union and extract common nodes for intersection using pointers and loops in Java. Explore time and space complexities crucial for optimizing coding interview solutions.

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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 ...