0141 Linked List Cycle

Solved at: 221023

Question

Given head, the head of a linked list, determine if the linked list has a cycle.

There is a cycle in a linked list if some node in the list can be reached again by continuously following the next pointer. Internally, pos is used to denote the index of the node that the tail's next pointer is connected to. Note that pos is not passed as a parameter.

Return true if there is a cycle in the linked list. Otherwise, return false.

Solution

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