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Challenge: Linked List Cycle

Explore how to detect cycles in a linked list by traversing its nodes and returning true if any node is revisited. This lesson helps you develop the skills to identify cycles using pointers and understand typical constraints in linked list cycle problems, preparing you for technical interviews.

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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 ...