The array-form of an integer num is an array representing its digits in left to right order. For example, for num = 1321, the array form is [1,3,2,1]. Given num, the array-form of an integer, and an integer k, return the array-form of the integer num + k. Example 1: Input: num = [1,2,0,0], k = 34 Output: [1,2,3,4] Explanation: 1200 + 34 = 1234 Example 2: Input: num = [2,7,4], k = 181 Output: [4,5,5] Explanation: 274 + 181 = 455 Example 3: Input: num = [2,1,5], k = 806 Output: [1,0,2,1] Explanation: 215 + 806 = 1021 Example 4: Input: num = [9,9,9,9,9,9,9,9,9,9], k = 1 Output: [1,0,0,0,0,0,0,0,0,0,0] Explanation: 9999999999 + 1 = 10000000000 Constraints: 1 <= num.length <= 104 0 <= num[i] <= 9 num does not contain any leading zeros except for the zero itself. 1 <= k <= 104