ListNode* middle = findMiddle(head); ListNode* right = sortList(middle->next); middle -> next = NULL; ListNode* left = sortList(head); returnmergeTwoLists(left, right); } };
Sort List 典型链表 https://leetcode.com/problems/sort-list/ Sort a linked list inO(nlogn) time using constant space complexity. 解题思路: 常见的O(nlogn)算法,快速排序、归并排序,堆排序。大概讲讲优缺点,在数据量很大并且很乱的时候,快速排序有着最快的平均速度,比如Java和C++语言的库排序函数就主要...
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 fast = head,slow = head,l2 = null; //fast...
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 描述 在O(n log n) 时间复杂度和常数级空间复杂度下,对链表进行排序。 示例1: 输入: 4...
leetcode 148. Sort List Sort a linked list inO(nlogn) 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 Output: -1->0->3->4->5 1....
Sort a linked list in O(n log n) time using constant space complexity.详细题解请见九章算法微博: http://weibo.com/3948019741/ByB4LtgnG 快速排序算法可以在链表中使用。// version 1: Merge Sort public class Solution
-- 题目大意:对一个链表排序,时间复杂度:O(NlogN) ,空间复杂度:O(1) 题目: 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 ...
148 Sort List Sort a linked list inO(nlogn) time using constant space complexity. Example: Input: 4->2->1->3 Output: 1->2->3->4 Input: -1->5->3->4->0 Output: -1->0->3->4->5 解释下题目: 链表排序,时间复杂度要求nlogn,且空间复杂度是常量...
# Sort a linked list in O(n log n) time using constant space complexity. # 思路 # 用链表的方式切分,然后递归Split,之后Merge # 这道题要注意是切分的时候,要写个Prev的函数用来储存Slow的原点 # Time: O(nlogn) # Space: O(1) # *** # Final Solution * # *** class Solution(object): ...
No.148 Sort List 2015-05-25 16:22 −No.148 Sort List Sort a linked list in O(n log n) time using constant space complexity. 分析: 常量空间且O(nlogn)时间复杂度,单链表适合用归并排序,双向链表适合用快速排序 ... 人生不酱油 0