所以,为了提高大家的算法能力,这个公众号后续每天带大家做一道算法题,题目就从LeetCode上面选 ! 今天和大家聊的问题叫做迷宫II,我们先来看题面: leetcode-cn.com/problem There is aballin a maze with empty spaces and walls. The ball can go through empty spaces by rol
Problem 11: Leetcode 907 给定一个整数数组 arr,找到 min(b) 的总和,其中 b 的范围为 arr 的每个(连续)子数组。 由于答案可能很大,因此 返回答案模 10^9 + 7 。 举个例子,如果arr = [3,1,2,4],那么输出17,因为它的子数组有[3],[1],[2],[4],[3,1],[1,2],[2,4],[3,1,2],[1,2...
1classSolution {2public:3vector<int> twoSum(vector<int> &numbers,inttarget) {45vector<int>result;6map<int,int>hashMap;78for(inti =0; i < numbers.size(); i++) {910if(!hashMap.count(numbers[i]))11hashMap.insert(pair<int,int>(numbers[i], i));//<value, key>1213if(hashMap.co...
代码如下: 1classSolution{2public:3ListNode* addToNumbers(ListNode* l1, ListNode*l2){4ListNode* result_list =newListNode(0);5ListNode* cursor_pointer =result_list;6intcarry_num =0;7while(true){8if(l1 !=NULL){9carry_num += l1->val;10l1 = l1->next;11}12if(l2 !=NULL){13carry_nu...
Problem 1: Leetcode 40 给定一个数组 candidates 和一个目标数 target ,找出 candidates 中所有可以使数字和为 target 的组合。 candidates 中的每个数字在每个组合中只能使用一次。 比方说candidates = [10,1,2,7,6,1,5], target = 8,那么输出就是 ...
1堆—优先队列 时间复杂度:O(NlogK) class Solution { public: class cmp { public: bool operator()(const pair<int, int>& a, const pair<int, int>& b) { return a.second >= b.second; } }; vector<int> topKFrequent(vector<in SL_World 2021/09/18 2150 LeetCode 56. 合并区间(优先队列...
A collection of Python codes for Leetcode Problem of the Day leetcode leetcode-solutions leetcode-practice leetcode-python leetcode-python3 leetcode-solution leetcode-programming-challenges leetcode-solutions-python problem-of-the-day problem-of-the-day-solutions leetcode-potd Updated Dec 23, ...
solution feat: add solutions to lc problem: No.2434 (#4465) Jun 6, 2025 .clang-format style: update format options Sep 6, 2022 .editorconfig chore: add configuration file .editorconfig (#3336) Jul 31, 2024 .gitignore chore: update .gitignore Apr 26, 2025 ...
Hi, I need help understanding this question solution. The problem is https://leetcode.com/problems/find-the-minimum-cost-array-permutation/ Basically we are given a permutation of 0 to n and have to construct another permutation resres that minimizes the function: ∑n−1i=0∣∣res[i]...
这个问题是典型的荷兰国旗问题 (https://en.wikipedia.org/wiki/Dutch_national_flag_problem)。 因为我们可以将红白蓝三色小球想象成条状物,有序排列后正好组成荷兰国旗。解法一 - 计数排序 遍历数组,统计红白蓝三色球(0,1,2)的个数根据红白蓝三色球(0,1,2)的个数重排数组 这种思路的时间复杂度:$...