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Subarray Sum Divisible by K – Optimal Approach Using Prefix Sum + HashMap | C++, Java, Python
In this video, we solve the Subarray Sum Divisible by K problem and understand the intuition behind the optimized approach. Instead of checking every subarray, we use the prefix sum technique along with a HashMap to efficiently count the number of subarrays whose sum is divisible by K. In this video we cover: • Brute force intuition and why ...
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