/** * Definition for singly-linked list. * class ListNode { * int val; * ListNode next; * ListNode(int x) { * val = x; * next = null; * } * } */ public class Solution { public boolean hasCycle(ListNode head) { if(head == null){ return false; } ListNode slow = head; ListNode fast = head.next; while (fast != null){ if(slow == fast){ return true; } slow = slow.next; fast = fast.next; if(fast != null){ fast = fast.next; } } return false; } }
相关推荐
若两者能够相遇,则有环,否则,若在这个过程中检测到了链表尾,则无环。 Reverse Linked List Reverse a linked list. Challenge: Reverse it in-place and in one-pass A linked list can be reversed either ...
linked-list-cycle-ii 链表 linked-list-cycle 链表 copy-list-with-random-pointer 复杂度 single-number 动态规划 candy 贪心 gas-station 动态规划 palindrome-partitioning-ii 动态规划 triangle 树 sum-root-to...
答案leetcode-java leetcode.com 的 Java 答案 ================索引================ com.leetcode.array Search a 2D Matrix Spiral Matrix com.leetcode.list Linked List Cycle Linked List Cycle II Remove ...
preorder-traversal链表reorder-list链表linked-list-cycle-ii链表linked-list-cycle动态规划word-break-ii动态规划word-break链表copy-list-with-random-pointer复杂度single-number-ii复杂度single-number动态规划
141-环形链表:linked-list-cycle 142-环形链表:linked-list-cycle-ii 160-相交链表:intersection-of-two-linked-lists 206-反转一个单链表:reverse-linked-list 20-有效的括号:valid-parentheses 150-逆波兰表达式求...
leetcode中325题python leetcode 以 参考 和 Hash相关 1_两数之和 ...linked-list-cycle-ii 143 重排链表 reorder-list 148 排序链表 sort-list 234 回文链表 palindrome-linked-list 双指针遍历/滑动
leetcode怎么销号 LeetCode便签 Linked List Cycle 问题描述 Given a linked list, determine if it has a cycle in it. Follow up:Can you solve it without using extra space? 解决思路 声明一个慢指针和一个快...
* [Linked List](https://github.com/kamyu104/LeetCode#linked-list) * [Stack](https://github.com/kamyu104/LeetCode#stack) * [Queue](https://github.com/kamyu104/LeetCode#queue) * [Heap]...
leetcode ...List(链表) ID Difficulty Title Python C++ Blog 21 Easy Merge Two Sorted Lists 83 * Remove Duplicates from Sorted List 141 * Linked List Cycle 160 * Intersection of Two Linke
leetcode有效期 Datawhale-Coding All Tasks Task 1:数组和链表(2天) 时间:2019-08-03 21:00 - 2019-08-05 21:00 讨论&CR时间: 2019-08-05 21:00 - 2019-08-05 22:30 【数组】 实现一个支持动态扩容的数组 实现...
leetcode中文版 LeetCode/Cpp 本人刷题记录在此,包含题意理解与算法思路,包含在Cpp文件内部注释,后续会持续更新。 有不懂的可以联系ji648513181,同时也欢迎志同道合O的朋友一起合作更新。 已更新剑指Offer答案...
List(链表) ID Difficulty Title Java Python 21 Easy Merge Two Sorted Lists 83 Easy Remove Duplicates from Sorted List 141 Easy Linked List Cycle 160 Easy Intersection of Two Linked Lists 203 Easy ...
linked-list-cycle/Solution.993783.java $ tree . ├── add-binary │ └── Solution.665166.java ├── add-two-numbers │ └── Solution.666385.java ├── balanced-binary-tree │ └── ...
leetcode-java leetcode刷题笔记 已做题目列表 1.Two Sum 3.Longest Substring Without Repeating Characters 5.Longest Palindromic Substring 20.Valid Parentheses 26.Remove Duplicates from Sorted Array 53....
java二叉树算法源码 algorithm-primer algorithm primer - 算法基础、Leetcode编程、剑指offer 目录 Leetcode编程 ...判断链表是是否存在环 Linked List Cycle Easy 142 环形链表II Linked List Cycle I
leetcode添加元素使和等于 总结 按照类别分类来刷 刷当前题的时候,看下『题目描述』最底下有个『相似题目』,这些题的思路...linked-list-cycle-ii reverse-nodes-in-k-group 二叉树 实现一个二叉树 二叉树二叉树的
leetcode ...List(链表) ID Difficulty Title Python C++ Blog 21 Easy Merge Two Sorted Lists 83 * Remove Duplicates from Sorted List 141 * Linked List Cycle 160 * Intersection of Two Linke
判断链表是否有环。通过快慢节点可以简单实现。 Unique Binary Search Trees 本题参考了 里面的*How Many Binary Trees Are There?*章节。 The first few terms: C(0) = 1 C(1) = C(0)C(0) = 1 C(2) = C(0)C(1) + C...
leetcode卡 leetcode exercises 3-5 solutions everyday. fighting~ TODO array Best Time to Buy and Sell Stock II Valid Sudoku linked list Palindrome linked list Linked List Cycle trees Convert Sorted ...
环形链表(Linked List Cycle) 2018.9.25 环形链表 II(Linked List Cycle II) 2018.9.26 删除排序链表中的重复元素 II(Remove Duplicates from Sorted List II) 2018.9.27 重建二叉树(Rebuild Binary Tree) ...