algorithm notes: leetcode#66 plus one

class (object):
    def plusOne(self, digits):
        """
        :type digits: List[int]
        :rtype: List[int]
        """
        return [int(s) for s in str(int(''.join([str(d) for d in digits]))+1)]

class (object):
    def plusOne(self, digits):
        """
        :type digits: List[int]
        :rtype: List[int]
        """
        num = 0
        for d in digits:
            num = num * 10 + d
        return [int(d) for d in str(num+1)]