Cycle Detection

Definition

Floyd's Tortoise and Hare algorithm uses two pointers moving at different speeds to detect if a Linked List loops infinitely. It detects a cycle in O(N) time and O(1) space.

Explain Like I'm New

If two runners are on a circular track and one runs twice as fast as the other, the fast runner will eventually lap the slow runner.

Interactive Coding Challenges

Linked List Cycle (Floyd's Tortoise & Hare)

Solution Code

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O(N) Time, O(1) Space.