找中点的程序可以参考[LeetCode] 876. Middle of the Linked List_Easy tag: Linked List。note: 注意找中点的时候,如果是偶数,应该选第一个 merge left, right的程序可以参考[LeetCode] 21. Merge Two Sorted Lists_Easy tag: Linked List。 code #Definition for singly-linked list.#class ListNode:#def ...
https://leetcode.com/problems/sort-list/ 题目: Sort a linked list in O(n log n) time using constant space complexity. 思路: 用归并排序,难点在递归划分链表中点。本题解答参考了网络答案。 算法: public ListNode sortList(ListNode head) { if(head==null||head.next==null) return head; ListNode...
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...
Singly-linked list: linked list in which each node points to the next node and the last node points to null Doubly-linked list: linked list in which each node has two pointers, p and n, such that p points to the previous node and n points to the next node; the last node's n poi...
// are kept in a circular doubly linked list ordered by access time. struct LRUHandle { void* value; void (*deleter)(const Slice&, void* value); // 释放 key value 空间用户回调 LRUHandle* next_hash; // 用于 Hashtable 处理链表冲突 ...
Leetcode: Insertion Sort List 题目:Sort a linked list using insertion sort. 即使用插入排序对链表进行排序。 思路分析: 插入排序思想见《排序(一):直接插入排序 》 C++参考代码: /** * Definition for singly-linked list. * struct ListNode {...
LeetCode:Sort List Problem: Sort a linked list inO(nlogn) time using constant space complexity. 解题思路: 首先,时间复杂度能达到O(nlgn)的排序算法,常见的有3种:堆排序、归并排序和高速排序, 而对于链表,用堆排序显然不太可能,所以,我们可用归并或者是快排.因为合并两个链表,仅仅用...
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 算法: ...
LeetCode: 148. Sort List LeetCode: 148. Sort List 题目描述 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 1. 2. Example 2: Input: -1->5->3->4->0...
LeetCode :: Insertion Sort List [具体分析] Sort a linked list using insertion sort. 仍然是一个很简洁的题目,让我们用插入排序给链表排序;这里说到插入排序。能够来回想一下, 最主要的入门排序算法。就是插入排序了。时间复杂度为n^2。最主要的插入排序是基于数组实现的。以下给出基于数组实现的插入排序,...