Statementâ–¼
Given the head
of a linked list, determine whether the list contains a cycle. A cycle exists if a node in the list can be revisited by continuously following the next
pointers. Return TRUE if a cycle is present; otherwise, return FALSE.
Constraints:
Let n
be the number of nodes in a linked list.
- 0≤
n
≤500 - −105≤
Node.value
≤105