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Solution: Linked List Cycle

Understand how to detect cycles in linked lists by implementing Floyd's cycle-finding algorithm. Learn to use two pointers moving at different speeds to identify cycles efficiently while analyzing time and space complexity. This lesson equips you with a practical solution commonly tested in coding 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 n 500\leq 500

  • 5×103-5 \times 10^3 \leq ...