Given an array, how can you validate the existence of a continuous subarray sum that matches a given number? Additionally, how would you return the starting and ending indices of that subarray? If there are multiple longest subarrays, how can you return all their starting and ending indices?

Question

Accepted Answer

Validate continuous subarray sum and return indices of matching subarrays.

Use a hashmap to store cumulative sums and their indices.
Iterate through the array, calculating the cumulative sum.
Check if the cumulative sum minus the target exists in the hashmap.
If found, record the starting and ending indices of the subarray.
Example: For array [1, 2, 3, 4] and target 5, subarray [2, 3] matches.

Asked in Microsoft Corporation

Given an array, how can you validate the existence of a continuous subarray sum that matches a given number? Additionally, how would you return the starting and ending indices of that subarray? If there are multiple longest subarrays, how can you return all their starting and ending indices?

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