https://oj.leetcode.com/discuss/3577/i-use-quick-sort-to-sort-the-list-but-why-i-get-time-limited View Code GITHUB: https://github.com/yuzhangcmu/LeetCode_algorithm/blob/master/list/SortList.java
For each round, the iteration is O(n). And for merge sort, we totally need run the iteration for lg(n) round(the height of recursion tree). So, the total time complexity is O(nlgn). Maybe someone can share a brief implementation. My current code is a bit fat. 1:ListNode*sortList...
循环版本号主函数例如以下: ListNode*sortList(ListNode*head){ListNode*cur=head;intsize=0;while(cur){size++;cur=cur->next;}ListNode*pre;for(intw=1;w<=size;w*=2){cur=head;for(inti=0;i<size;i+=w*2){ListNode*h1=cur,*h2=getNode(cur,w),*next=getNode(cur,2*w);cur=merge(h1,min(...
/** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */ class Solution { public ListNode sortList(ListNode head) { if(head==null||head.next==null) return head; ListNode dummy = new ListNode(0); L...
Leetcode - Sort List My code: /** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */publicclassSolution{publicListNodesortList(ListNodehead){if(head==null)returnnull;intcount=0;ListNodetemp=head;while(...
LeetCode Sort List 链表排序(规定 O(nlogn) ) Status: Accepted Runtime: 66 ms 题意:根据给出的单链表,用O(nlogn)的时间复杂度来排序。由时间复杂度想到快排、归并这两种排序。本次用的是归并排序。递归将链表的规模不断二分到只剩下1或2个元素为止,这也是递归出口,一旦出现这两种情况就可以返回。这里...
sort-list_leetcode笔试题_牛客网 https://gw-c.nowcoder.com/api/sparta/jump/link?link=https%3A%2F%2Fwww.nowcoder.com%2FquestionTerminal%2Fd75c232a0405427098a8d1627930bea6%3Ff%3Ddiscussion LeetCode刷题圈 全部评论 推荐 最新 楼层 相关推荐 02-19 12:02 已编辑 字跳网络_技术leader 从算法竞赛到...
classSolution:defmissingNumber(self,nums:List[int])->int:nums.sort()ifnums[-1]!=len(nums):returnlen(nums)elifnums[0]!=0:return0foriinrange(1,len(nums)):#从1开始检查,把0作为nums[i-1]+1的起点expected_num=nums[i-1]+1ifnums[i]!=expected_num:returnexpected_num ...
Loading...leetcode.com/problems/course-schedule-iii/discuss/104847/Python-Straightforward-with-Explanation 下面是我的解答,太慢,可以用来理解解题过程,但不用参考。 importheapqclassSolution:defscheduleCourse(self,courses:List[List[int]])->int:# 优先选早结课的课程,无论这门课花的时间长短,都会是最优...
LeetCode Question & Answer Linked List Cycle Deion: Given a linked list, determine if it has a cycle in it. Follow up: Can you solve it without using extra space? Input: “A man, a plan, a canal: Panama” Output: true Solution: ...