# 989. Add to Array-Form of Integer LeetCode Solution | Easy Approach

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Add to Array-Form of Integer 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
```

Constraints:

• `1 <= num.length <= 104`
• `0 <= num[i] <= 9`
• `num` does not contain any leading zeros except for the zero itself.
• `1 <= k <= 104`

Time: O(n)
Space: O(n)

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