Update

problems/0093.复原IP地址.md

@@ -352,6 +352,7 @@ class Solution(object):
         ans = []
         path = []
         def backtrack(path, startIndex):
+            if len(s) > 12: return []
             if len(path) == 4:
                 if startIndex == len(s):
                     ans.append(".".join(path[:]))
@@ -367,7 +368,7 @@ class Solution(object):
                 path.pop()
 
         backtrack([], 0)
-        return ans```
+        return ans
 ```