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Linked List Cycle IV

Understand how to detect and remove cycles in singly linked lists using the fast and slow pointer method. This lesson guides you through modifying linked lists in place to remove loops while preserving node order, helping you master crucial coding interview patterns.

Statement

Given the head of a singly linked list, implement a function to detect and remove any cycle present in the list. A cycle occurs when a node's next pointer links back to a previous node, forming a loop within the list.

The function must modify the linked list in place, ensuring it remains acyclic while preserving the original node order. If no cycle is found, return the linked list as is.

Constraints:

  • The number of nodes in the list is in the range [0 ...