Python3 One Line
A = [1,2,0,0], K = 34\n[1,2,0,0] -> "1200" -> 1200 -> add K -> 1234 -> "1234" -> [1,2,3,4]\npython\nclass Solution:\n    def addToArrayForm(self, A: \'List[int]
A = [1,2,0,0], K = 34\n[1,2,0,0] -> "1200" -> 1200 -> add K -> 1234 -> "1234" -> [1,2,3,4]\n```python\nclass Solution:\n    def addToArrayForm(self, A: \'List[int]\', K: \'int\') -> \'List[int]\':\n        return [int(s) for s in str(int(\'\'.join(str(x) for x in A)) + K)]\n```
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