class Solution { public ListNode addTwoNumbers(ListNode l1, ListNode l2) { ListNode head = null, tail = null; //维护的四个指针,上面两个用于遍历输入链表,下面两个用于维护加和结果链表 int carry = 0; //记录进位信息 while (l1 != null || l2 != null) { //循环的出口是两个指针全到达尾部...
DailyProblem Maximum Depth of Binary Tree Jul 28, 2020 Interview Search Insert Position Jul 17, 2020 InterviewPrepare Pascal's Triangle Jan 14, 2022 List 解决LeetCode.33题,注意数组里有一个值和有两个值的特殊情况; May 8, 2017 PowerOfX 解决LeetCode342题; Oct 25, 2016 ...
As can be seen from the above process, the problem of brute force cracking is that the time complexity ofis too high, and the reason is high becausehas some skipped processesin the traversal process. In order to facilitate understanding, we bring in a problem Example 1 in the case oftarget...
LeetCode-Problem-Sets Answers for the leetcode problems Solutions MAY vary with offical LeetCode Solutions. PLEASE do a pull request for more elegant solutions(New Issue Request Template, make sure to read it!). Tips for beginners: If you are spending too much time on a problem, look and ...
class Solution { public: int sumDistance(vector<int>& nums, string s, int d) { vect...
思考时，注意到必须要找到课程之间的先后关系，而且必须是是挨着的，连续的先后关系。不然会漏情况。
No registration is required. To join, just start solving the daily problem on the calendar of theproblem page. You can also find the daily problem listed on the top of theproblem page. The daily problem will be updated onevery 12 a.m. Coordinated Universal Time (UTC)and you will have ...
2 Add Two Numbers Solution O(max(m,n)) O(1) Medium LinkedList 3 Longest Substring Without Repeating Characters Solution O(n) O(k) Medium HashMap, Sliding Window 4 Median of Two Sorted Arrays Solution ? ? Hard Divide and Conquer
The n-queens puzzle is the problem of placingnqueens on ann x nchessboard such that no two queens attack each other. Given an integern, returnthe number of distinct solutions to the n-queens puzzle. Example 1: Input: n = 4 Output: 2 ...
from collectionsimportdefaultdictclassSolution:defmaxPoints(self,points):""":type points:List[Point]:rtype:int""" slopes,result=defaultdict(int),0fori,point1inenumerate(points):slopes.clear()duplicate=1for_,point2inenumerate(points[i+1:]):ifpoint1.x==point2.x and point1.y==point2.y:dup...