Sort a linked list in O(n log n) time using constant space complexity. 2.翻译 1 在固定的空间复杂度中使用O(nlog n)的时间复杂度进行链表的排序。 3.思路分析 提起排序,我们脑海中会迅速出现各种排序算法:冒泡排序、快速排序、简单排序、堆排序、直接插入排序、希尔排序(递减增量排序)、直接选择排序、堆...
java代码: 1/**2* Definition for singly-linked list.3* class ListNode {4* int val;5* ListNode next;6* ListNode(int x) {7* val = x;8* next = null;9* }10* }11*/12publicclassSolution {13publicListNode sortList(ListNode head) {14if(head==null||head.next==null)returnhead;15ListN...
Sort a linked list in O(n log n) time using constant space complexity. 本题就是考察的是链表的归并排序。 代码如下: /*class ListNode { int val; ListNode next; ListNode(int x) { val = x; } }*/ public class Solution { public ListNode sortList(ListNode head) { return mergeSort(head);...
publicListNodemergeSort(ListNodehead) { if(head==null||head.next==null)returnhead;// !!!注意边界,容易出现堆栈溢出错误 ListNodefast=head,slow=head;// 通过快慢指针定位中间节点 while(fast.next!=null&&fast.next.next!=null) { fast=fast.next.next; slow=slow.next; } ListNodep1=mergeSort(slow....
Sort a linked list using insertion sort. 原问题链接:https://leetcode.com/problems/sort-list/ 问题分析 有时候,往往是一些看似简单的问题描述 ,其解决方法越麻烦。这里问题描述确实简单,对于一个链表来说,我们需要寻找一种时间复杂度为O(NlogN)的排序法。对于数组来说,要找到这种时间复杂度的方法有好几种,...
* struct ListNode { * int val; * ListNode *next; * ListNode() : val(0), next(nullptr) {} * ListNode(int x) : val(x), next(nullptr) {} * ListNode(int x, ListNode *next) : val(x), next(next) {} * }; */ class Solution { public: ListNode* sortList(ListNode* head) { ...
简介:题目:Sort List Sort a linked list in O(n log n) time using constant space complexity 看题目有两个要求:1)时间复杂度为O(nlogn);2)空间复杂度为常数,即不能增设额外的空间。 题目:Sort List Sort a linked listinO(n log n) timeusingconstant space complexity ...
12、链表的排序:Sort List - LeetCode Sort a linked list in O(n log n) time using constant space complexity. Example 1: Input: 4->2->1->3 Output: 1->2->3->4 Example 2: Input: -1->5->3->4->0 Output: -1->0->3->4->5 class Solution { public: ListNode* sortList(List...
Can you solve this real interview question? Sort List - Given the head of a linked list, return the list after sorting it in ascending order. Example 1: [https://assets.leetcode.com/uploads/2020/09/14/sort_list_1.jpg] Input: head = [4,2,1,3] Outpu
Given the head of a singly linked list, sort the list using insertion sort, and return the sorted list's head. The steps of the insertion sort algorithm: Insertion sort iterates, consuming one input element each repetition and growing a sorted output list. At each iteration, insertion sort ...