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Leetcode 989. Add to Array-Form of Integer

Given an integer represented as a digit array and an integer k, compute the array-form of num + k by simulating addition from the least-significant digit, handling carries and differing lengths. This can be done in O(max(n, log k)) time and O(1) extra space (excluding output).

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Leetcode 989. Add to Array-Form of Integer | Hello Interview