sum += nums[i]; if(map.containsKey(sum - k)) { res += map.get(sum - k); } map.put(sum, map.getOrDefault(sum,0) +1); } returnres; } } JavaScript实现 /** *@param{number[]}nums *@param{number}k *@return{number} */ varsubarraySum =function(nums, k) { // corner case...
找到 K 个最接近的元素 Find K Closest Elements 236 -- 14:39 App LeetCode力扣 207. 课程表 Course Schedule 56 -- 7:33 App LeetCode力扣 33. 搜索旋转排序数组Search in Rotated Sorted Array 421 -- 8:43 App Python每日一练-数组练习-运动和卡路里计算 37 -- 5:44 App LeetCode力扣 285. ...
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...
The range of numbers in the array is [-1000, 1000] and the range of the integer k is [-1e7, 1e7]. 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]...
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++){ ...
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) .Here’s an example: Let’s say you’ve iterated to index 5 (randomly chosen) and ...
Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k. Example 1: Input:nums = [1,1,1], k = 2 Output: 2 1. 2. Constraints: The length of the array is in range [1, 20,000]. ...
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 ...
Subarray Sum Equals K 2. Solution 解析:Version 1,使用前缀和来解决,遍历数组,求前缀和,统计前缀和的次数并保存到字典中,当碰到差值在字典中存在时,则意味着当前数组减去之前的前缀和数组等于k,将次数加到count中,更新前缀和的次数。注意,假设第一个数就等于k,此时数组中没有差值0的次数,因此stat[0]=1。