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How I Solved “Subarray Sum Equals K” | LeetCode 560
- The problem is to find the number of subarrays in an array whose sum is equal to a given target value, k.
- The brute force method has a time complexity of O(n²) and is not efficient for large arrays.
- An optimized solution using a hash map can reduce the time complexity to O(n).
- The optimized solution efficiently finds the answer by keeping track of prefix sums using a hash map.
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