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DIY: Maximum Sum of Three Non-Overlapping Arrays

Understand how to identify three non-overlapping subarrays of size k that produce the maximum sum from a given integer array. Explore techniques for returning the lexicographically smallest indices of these subarrays, and implement a solution suitable for coding interviews.

Problem statement

In this challenge, you are given an array of integers as input. Your task is to find three non-overlapping subarrays of the given array that have the maximum sum. The subarray should be of size ...