[Python] 1-line
Explanation\nFor each a in input array A,\nfor each digit char c in string a,\ntransform c into an integer.\n\n\n# Complexity\nTime O(digits)\nSpace O(digits)\n
# **Explanation**\nFor each `a` in input array `A`,\nfor each digit char `c` in string `a`,\ntransform `c` into an integer.\n<br>\n\n# **Complexity**\nTime `O(digits)`\nSpace `O(digits)`\n<br>\n\n**Python**\n```py\n    def separateDigits(self, A):\n        return [int(c) for a in A for c in str(a)]\n```\n
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