时间复杂度O(nlogn) 不考虑递归栈空间的话空间复杂度是O(1) 首先用快慢指针的方法找到链表中间节点,然后递归的对两个子链表排序,把两个排好序的子链表合并成一条有序的链表。归并排序应该算是链表排序最佳的选择了,保证了最好和最坏时间复杂度都是nlogn,而且它在数组排序中广受诟病的空间复杂度在链表排序中也...
To archive this, I use two pointers, left_tail and right_tail to record both tail of left list and right list. With a variable left_head, I record the pointer to the node whose value equals to head's. 1ListNode *binarySort(ListNode *head, ListNode * left, ListNode *right) {2//zer...
LeetCode之 insertion-sort-list && insertion-sort-list 尝试着刷刷一些经典LeetCode题练练手感,随手做了两道看起来不起眼但还是需要一些细节的题: 1. 题目描述 Given a binary tree, find its minimum depth.The minimum depth is the number of nodes along the shortest path from the root node down to ...
leetcode 148. Sort List 链表归并排序 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(Lis...
【Leetcode】Insertion Sort List https://leetcode.com/problems/insertion-sort-list/ 题目: Sort a linked list using insertion sort. 思路: 头插法。用头结点可以简化插入链表时候的操作,因为要考虑插入链表中间和表头两种情况,插入表头时,head就要更新,还要判断pre指针是否为空...
代码: /** * Definition for singly-linked list. * struct Li ... 【leetcode】Insertion Sort List (middle) Sort a linked list using insertion sort. 思路: 用插入排序对链表排序.插入排序是指每次在一个排好序的链表中插入一个新的值. 注意:把排好序的部分和未排序的部分 ... 9. Sort List ...
Code Issues Pull requests GoDS (Go Data Structures) - Sets, Lists, Stacks, Maps, Trees, Queues, and much more gomapgolangsetlisttreedata-structureavl-treestackqueueiteratorsortred-black-treeenumerablebinary-heapb-tree UpdatedAug 18, 2024 ...
My Solutions to Leetcode problems. All solutions support C++ language, some support Java and Python. Multiple solutions will be given by most problems. Enjoy:) 我的Leetcode解答。所有的问题都支持C++语言,一部分问题支持Java语言。近乎所有问题都会提供多个算
*/classSolution{publicListNodesortList(ListNode head){if(head==null||head.next==null)returnhead;// 1. find mid of listListNode fast=head,slow=head,partHead=slow;while(fast!=null&&fast.next!=null){partHead=slow;fast=fast.next.next;slow=slow.next;}// 2. cut list as binarypartHead.nex...
packageleetcode/** * Definition for singly-linked list. * type ListNode struct { * Val int * Next *ListNode * } */funcinsertionSortList(head*ListNode)*ListNode{ifhead==nil{returnhead}newHead:=&ListNode{Val:0,Next:nil}// 这里初始化不要直接指向 head,为了下面循环可以统一处理cur,pre:=head...