https://leetcode.com/problems/sort-list/ 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->…

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/sort-list/description/ 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…

Sort a linked list in O(n log n) time using constant space complexity. 链表排序可以用很多方法,插入,冒泡,选择都可以,也容易实现,但是复杂度不符合题意要求. 然后时间复杂度在O(nlogn)的排序算法中,堆排序,快速排序,归并排序. 堆排序,主要是基于数组的,这里是链表,实现起来比较麻烦. 快速排序,快速排序最坏情况的时间复杂度是O(n2) 归并排序,在对数组的归并排序中,是有O(n)的空间复杂度的,但是链表可以不需要,我们…

Sort List 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 解法1 归并排序.用两个函数实现: merge:将两个有…

原题 别人的思路 非常简洁 function ListNode(val) { this.val = val; this.next = null; } /** * @param {ListNode} head * @return {ListNode} */ var insertionSortList = function(head) { if (head === null) { return head; } var helper = new ListNode(0); var cur = head.…

leetcode 148. Sort List 提交网址: https://leetcode.com/problems/sort-list/  Total Accepted: 68702 Total Submissions: 278100 Difficulty: Medium  ACrate: 24.7% Sort a linked list in O(n log n) time using constant space complexity. 由于需要使用常量空间,即S(n)=O(1),故需要…

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 常见排序方法有很多,插入排序,选择排序,堆排序,快速排序,冒泡排序,归并排序…

Solution 148. Sort List Question 题目大意:对链表进行排序 思路:链表转为数组,数组用二分法排序 Java实现: public ListNode sortList(ListNode head) { // list to array List<Integer> list = new ArrayList<>(); ListNode cur = head; while (cur != null) { list.add(cur.val); cur = cur…

leetcode - 40. Combination Sum II - Medium descrition Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. Each number in C may only be used once in the combinat…

Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3].... Example 1: Input: nums = [1, 5, 1, 1, 6, 4] Output: One possible answer is [1, 4, 1, 5, 1, 6]. Example 2: Input: nums = [1, 3, 2, 2, 3, 1] Output: One po…