[Python] 99.75%: List -> str -> int+1 -> str -> List
Runtime: 20 ms, faster than 99.74% of Python3 online submissions for Plus One.\nMemory Usage: 14 MB, less than 99.00% of Python3 online submissions for Plus One
*Runtime: 20 ms, faster than 99.74% of Python3 online submissions for Plus One.\nMemory Usage: 14 MB, less than 99.00% of Python3 online submissions for Plus One.*\n\nVariables named as writes are much faster than reads:\n```\nclass Solution:\n    def plusOne(self, digits: List[int]) -> List[int]:\n        a = \'\'.join(map(str, digits))\n        b = int(a) + 1\n        c = str(b)\n        return list(map(int, c))\n```\nhttps://leetcode.com/submissions/detail/469908019/
['Python']