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 $1321$ 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:

• $1 \leq$ num.length $\leq 10^4$

• $0 \leq$ num[i] $\leq 9$

• num does not contain any leading zeros except for the zero itself ...