# Leetcode - Add to Array-Form of Integer Solution

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 <= 10`

^{4}`0 <= num[i] <= 9`

`num`

does not contain any leading zeros except for the zero itself.`1 <= k <= 10`

^{4}

## Solution in Python

```
class Solution:
def addToArrayForm(self, A: List[int], K: int) -> List[int]:
A[-1] += K
for i in range(len(A) - 1, -1, -1):
carry, A[i] = divmod(A[i], 10)
if i: A[i-1] += carry
while carry:
A = [carry%10] + A
carry//=10
return A
```