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Solution: Add to Array-Form of Integer

Understand how to solve the problem of adding an integer to the array representation of another integer. Learn to process addition digit by digit from right to left, manage carries efficiently, and implement a time and space optimized solution useful for coding interviews.

Statement

The array form of an integer is defined as an array of its digits ordered from left to right. For instance, the array form of 13211321 is [1, 3, 2, 1].

You are given num, which represents an integer in its array form, and an integer k. Compute the sum of the integer represented by num and k, then return the result as an array form representation.

Note: num will not contain leading zeros unless the number itself is zero.

Constraints:

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