Leetcode 141. Linked List Cycle in Python | Python Leetcode | Python Coding Tutorial | Python ASMR

Pubblicato il: 07 febbraio 2025
sul canale di: Code is Art
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Leetcode 141. Linked List Cycle in Python | Python Leetcode | Python Coding Tutorial | Python ASMR


Given head, the head of a linked list, determine if the linked list has a cycle in it.
There is a cycle in a linked list if there is some node in the list that can be reached again by continuously following thenextpointer. Internally, posis used to denote the index of the node thattail'snextpointer is connected to.Note thatposis not passed as a parameter.
Returntrue if there is a cycle in the linked list. Otherwise, return false.

Example 1:
Input: head = [3,2,0,-4], pos = 1
Output: true
Explanation: There is a cycle in the linked list, where the tail connects to the 1st node (0-indexed).

Example 2:
Input: head = [1,2], pos = 0
Output: true
Explanation: There is a cycle in the linked list, where the tail connects to the 0th node.

Example 3:
Input: head = [1], pos = -1
Output: false
Explanation: There is no cycle in the linked list.

Leetcode Problem Link: https://leetcode.com/problems/linked-...


Code Link : https://github.com/CodeIsArtYT/Leetco...

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