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Grokking the Coding Interview Patterns in Python

Solution: Linked List Cycle III

Explore how to use fast and slow pointers to identify cycles in linked lists and calculate the exact cycle length. This lesson helps you implement a proven algorithm to detect cycles efficiently and understand its time and space complexity, preparing you to solve similar coding interview problems confidently.

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Statement

Given the head of a linked list, determine the length of the cycle present in the linked list. If there is no cycle, return 0.

A cycle exists in a linked list if there is some node in the list that can be reached again by continuously following the next pointer.

Constraints:

  • The number of nodes in the list is in the range [0,104][0, 10^4]. ...