We are given head, the head node of a linked list containing unique integer values. We are also given the list G, a subset of the values in the linked list. Return the number of connected components in G, where two values are connected if they appear…

题目标签:Linked List 题目给了我们一组 linked list, 和一组 G, 让我们找到 G 在 linked list 里有多少组相连的部分. 把G 存入 hashset,遍历 linked list, 利用 hashset 来检查目前的点 和 下一个点 是否在G 里面. 如果目前的点在G里面,下一个点不在,说明这里断开了.具体看code. Java Solution: Runtime:  7 ms, faster than 81 % Memory Usage: 40 MB, l…

https://leetcode.com/problems/linked-list-components/ We are given head, the head node of a linked list containing unique integer values. We are also given the list G, a subset of the values in the linked list. Return the number of connected componen…

Question 817. Linked List Components Solution 题目大意:给一个链表和该链表元素组成的一个子数组,求子数组在链表中组成多少个片段,每个片段中可有多个连续的元素 思路:构造一个set用来存储子数组元素用于判断是否存在,遍历链表,如果当前元素不存在而下一个元素存在就表示一个片段的开始了,遍历前先判断首元素是否存在 Java实现: public int numComponents(ListNode head, int[] G) { Set<Integer>…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 日期 题目地址:https://leetcode.com/problems/linked-list-components/description/ 题目描述 We are given head, the head node of a linked list containing unique integer values. We are also g…

1. 原始题目 We are given head, the head node of a linked list containing unique integer values. We are also given the list G, a subset of the values in the linked list. Return the number of connected components in G, where two values are connected if the…

Given a linked list, return the node where the cycle begins. If there is no cycle, return null. To represent a cycle in the given linked list, we use an integer pos which represents the position (0-indexed) in the linked list where tail connects to.…

Given a linked list, determine if it has a cycle in it. To represent a cycle in the given linked list, we use an integer pos which represents the position (0-indexed) in the linked list where tail connects to. If pos is -1, then there is no cycle in…

Given a singly linked list, determine if it is a palindrome. Follow up: Could you do it in O(n) time and O(1) space? 这道题让我们判断一个链表是否为回文链表,LeetCode中关于回文串的题共有六道,除了这道,其他的五道为Palindrome Number 验证回文数字,Validate Palindrome 验证回文字符串,Palindrome Partitioning 拆分回文…

Given a linked list, determine if it has a cycle in it. Follow up:Can you solve it without using extra space? 给定一个链表,判断是否有环存在.Follow up: 不使用额外空间. 解法:双指针,一个慢指针每次走1步,一个快指针每次走2步的,如果有环的话,两个指针肯定会相遇. Java: public class Solution { public boolean hasCycle(Li…