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Solution: Linked List Cycle—Hashing

Explore how to determine if a linked list contains a cycle by using hashing to track visited nodes. This lesson helps you implement a Java algorithm that efficiently detects cycles by storing and checking nodes, understanding time and space complexity along the way.

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Statement

Given the head of a linked list, check whether or not a cycle is present in the linked list. A cycle is present in a linked list if at least one node can be reached again by traversing the next pointer. If a cycle exists, return TRUE, otherwise return FALSE.

Constraints:

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

  • 00 \leq n 500\leq 500 ...