Describe an advanced data structure : Array Problems Involving Modulos

The video tutorial covers the modulo operation, explaining its properties and how it applies to arrays. It introduces a problem of finding the minimum length subarray with a sum mod K equal to zero, demonstrating an efficient implementation using prefix sums and dictionaries. A new problem is introduced, involving removing elements from an array to achieve a sum mod 3 equal to zero.

What is the significance of the prefix sum in the context of subarrays?

How does the implementation of the efficient solution differ from the naive approach?

What are the possible outcomes when the total sum of an array taken modulo 3 is equal to zero, one, or two?