Detect a Loop in Linked List
Medium Problems of Singly Linked List DSA practice problem on Onlearn.
Difficulty: medium.
Topics: Detecting a Loop in a Linked List, Linked List, Node, Hashing, Two Pointers, Time Complexity, Space Complexity, complexity analysis, hashing, general programming, cycle detection, linked list, Cycle Detection (Floyd's Algorithm).
Problem Statement Given the head of a singly linked list, determine if the linked list has a cycle in it. A cycle in a linked list means that there is some node in the list that 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. Input Specification The input will be a linked list. Output Specification Return true if a cycle is detected, false otherwise. Sample Test Cases Example 1: Example 2: