Master the steps to use fast and slow pointers for cycle detection and mid-point identification.

Central CIP Path

Fast and Slow Pointers

# Statement

Given the `head` of a linked list, determine whether the list contains a cycle. A cycle exists if a node in the list can be revisited by continuously following the `next` pointers. Return TRUE if a cycle is present; otherwise, return FALSE.

**Constraints:**

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

- $0\leq$ `n` $\leq500$
- $-10^5 \leq$ `Node.value` $\leq 10^5$




# Examples






Try to solve the Linked List Cycle problem.

Problem: Linked List Cycle

Statement

Examples