Solution: Remove Duplicates from Linked List - Hashing

Statement

Given the head of a singly linked list, remove any duplicate nodes from the list in place, ensuring that only one occurrence of each value is retained in the modified list.

Constraints:

Let n be the number of nodes in a linked list.

• $0 \leq$ n $\leq 500$
• $-5000 \leq$ Node.value $\leq 5000$