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+### 258. Add Digits
+
+题目:
+<https://leetcode.com/problems/add-digits/>
+
+
+难度:
+
+Easy
+
+
+思路
+
+这就简单的一p了。。
+
+
+```python
+class Solution(object):
+    def addDigits(self, num):
+        """
+        :type num: int
+        :rtype: int
+        """
+        while num / 10 >= 1:
+            tmp = 0
+            while num / 10 >= 1:
+                tmp += num % 10
+                num /= 10
+            tmp += num % 10
+            num = tmp
+        return num
+```
+
+