Solution: Linked List Cycle

Let’s solve the Linked List Cycle problem using the Fast and Slow Pointers pattern.


Check whether or not a linked list contains a cycle. If a cycle exists, return TRUE. Otherwise, return FALSE. The cycle means that at least one node can be reached again by traversing the next pointer.


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

  • 00\leq n 500\leq500
  • 105-10^5 \leq 105\leq 10^5

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