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LeetCode 21. Merge Two Sorted Lists（合并两个有序链表）

题意:合并两个有序链表 /** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */ class Solution { public: ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) { if(l1 == NULL) retu…

LeetCode 21. Merge Two Sorted Lists （合并两个有序链表）

Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. 题目标签:Linked List 题目给了我们两个lists,让我们有序的合并两个 lists. 这题利用递归可以从list 的最后开始向前链接nodes,代码很简洁,清楚. Java Solution: Runti…

21. Merge Two Sorted Lists[E]合并两个有序链表

题目 Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. Example:  Input:1->2->4, 1->3->4  Output:1->1->2->3->4->4 思路 思路一:建立一个新链表 建立一个新的链表,用…

[LC]21题 Merge Two Sorted Lists （合并两个有序链表）（链表）

①英文题目 Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. Example: Input: 1->2->4, 1->3->4 Output: 1->1->2->3->4->4 ②中文题目 将两个有序链表合并为一个新的有序…

LeetCode 23 Merge k Sorted Lists（合并k个有序链表）

题目链接: https://leetcode.com/problems/merge-k-sorted-lists/?tab=Description Problem: 给出k个有序的list, 将其进行合并得到一个有序的list   对于给出的ListNode[] lists ,可以进行两两合并.divide and conquer  将list分为前后两部分,对前半部分再次进行分半操作,对后半部分进行分半操作,然后将其进行合并操作. 合并操作也就是对两个list进行合并 合并操作可以采用递归算法…

merge two sorted lists， 合并两个有序序列

/** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */ public class Solution { public ListNode mergeTwoLists(ListNode l1, ListNode l2) { ListNode dumy = new ListNode(0); Li…

21. Merge Two Sorted Lists (Java 合并有序链表 空间复杂度O(1))

题目: Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. 分析:合并两个有序序列,这个归并排序中的一个关键步骤.这里是要合并两个有序的单链表.由于链表的特殊性,在合并时只需要常量的空间复杂度. 编码: public ListNode mergeTwoLists(Li…

LeetCode OJ：Merge Two Sorted Lists（合并两个链表）

Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. 注意题目要求合并的时候不能新建节点,直接使用原来的节点,比较简单,代码如下: /** * Definition for singly-linked list. * struct ListNode { * int va…

23. Merge k Sorted Lists[H]合并k个排序链表

题目 Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Example:  Input:  [   1->4->5,   1->3->4;   2->6  ]  Output:1->1->2->3->4->4->5->6 思路 思路1:堆排序 最小堆 优先队列 思路2:分冶法 Tips 1…

61.Merge k Sorted Lists（合并k个排序链表）

Level:   Hard 题目描述: Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Example: Input: [ 1->4->5, 1->3->4, 2->6 ] Output: 1->1->2->3->4->4->5->6 思路分析:   思路一:通过归并排序思想,将k个排好…