解法一:利用sum之间的差暴力搜索 classSolution {publicintsubarraySum(int[] nums,intk) {if(nums ==null|| nums.length == 0)return0;intlen =nums.length;int[] sum =newint[len+1];for(inti=0; i<len; i++) sum[i+1] = sum[i] +nums[i];intcnt = 0;for(inti=0; i<len; i++) ...
关键点:把所有出现过的sum存入map:sum为key,出现的次数为value;利用map来找k (新sum - k =? 任何旧sum) 1classSolution2{3publicintsubarraySum(int[] nums,intk)4{5intcount = 0;6intsum = 0;78Map<Integer, Integer> map =newHashMap<>();9map.put(0, 1);//initial value sum = 0, occurr...
LeetCode力扣 560. 和为 K 的子数组 Subarray Sum Equals KEdward留学求职 立即播放 打开App,流畅又高清100+个相关视频 更多438 -- 10:52 App 4 新手一天 100 道力扣题挑战|树的最大深度 双序 DFS 460 -- 10:41 App 1 新手一天100道力扣题挑战|树的最大深度 先序BFS 90 -- 7:22 App LeetCode...
Given an array of integersnumsand an integerk, returnthe total number of subarrays whose sum equals tok. A subarray is a contiguousnon-emptysequence of elements within an array. Example 1: Input: nums = [1,1,1], k = 2 Output: 2 Example 2: Input: nums = [1,2,3], k = 3 Outp...
Subarray Sum Equals K Problem: https://leetcode.com/problems/subarray-sum-equals-k/ Solution1: 利用累计和 Time complexity: O(n2) Space complexity: O(n) Solution2: 移动subarray的起点和终点,计算两点之间的和 Time complexity: O(n2) Space complexit......
The HashMap stores the sum of all elements before index i as key, and i as value. For each i, check not only the current sum but also (currentSum - previousSum) to see if there is any that equals k, and update max length. The keypoint is what the map.containsKey(sum - k) ....
时间复杂度&&空间复杂度:O(n)&&O(max sum[i]) AI检测代码解析 classSolution{ public: intsubarraySum(vector<int>&nums,intk) { intlen=nums.size(),ans=0,sum=0; unordered_map<int,int>exist; exist[0]=1; for(inti=0;i<len;i++){ ...
题意是给一个数组和一个数字K,请求出input数组中有多少个子数组的和为K。两种做法,一种是暴力解;一种会用到hashmap。 暴力解的思路是用两个for loop扫描input数组,扫描的时候记录累加和sum,再用一个变量记录是否有满足条件的子数组满足sum == k,若有就++。
classSolution {public:intmaxSubArrayLen(vector<int>& nums,intk) {if(nums.empty())return0;intres =0; unordered_map<int, vector<int>>m; m[nums[0]].push_back(0); vector<int> sum =nums;for(inti =1; i < nums.size(); ++i) { ...
c语言-leetcode题解之0560-subarray-sum-equals-kDa**es 上传841B 文件格式 zip c语言入门 c语言_leetcode题解之0560_subarray_sum_equals_k点赞(0) 踩踩(0) 反馈 所需:1 积分 电信网络下载 PS-AI-CDR快捷键大全.doc 2025-03-27 19:47:37 积分:1 ...