258_add_digits.py

# 执行用时 : 24 ms
# 内存消耗 : 11.7 MB

# 方案：递归


class Solution(object):
    def addDigits(self, num):
        """
        :type num: int
        :rtype: int
        """
        return (
            self.addDigits(sum([int(n) for n in str(num)]))
            if len(str(num)) != 1
            else num
        )