easyFast & Slow Pointers Pattern
Linked List Cycle
Given `head`, the head of a linked list, determine if the linked list has a cycle in it. Return `true` if there is a cycle, otherwise return `false`.
Examples
Input:
head = [3,2,0,-4], pos = 1Output:
trueExplanation: There is a cycle where tail connects to the 1st node (0-indexed).
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