Python3 | One line solution
\nclass Solution:\n    def addToArrayForm(self, num: List[int], k: int) -> List[int]:\n        return list(str(int("".join([str(x) for x in num])) + k))\n
```\nclass Solution:\n    def addToArrayForm(self, num: List[int], k: int) -> List[int]:\n        return list(str(int("".join([str(x) for x in num])) + k))\n```
['Python', 'Python3']