Leetcode 560. Subarray Sum Equals K | Java Solution and Explaination
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YouTubeSagar Medtiya
Leetcode 560. Subarray Sum Equals K | Java Solution and Explaination
Given an integer array nums and an integer k, return the total number of continuous subarrays whose sum equals k. Approach We use Prefix Sum + HashMap to solve this in O(n) time: Maintain a running sum (prefix sum) while iterating through the array. Use a HashMap to store how many times a particular prefix sum has appeared. Key = prefix sum ...
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