Update 66. 把数字翻译成字符串.md

Author: jasoncao11

66. 把数字翻译成字符串.md

@@ -10,21 +10,22 @@
 class Solution:
     def translateNum(self, num: int) -> int:
         res = []
-        cur_id = 0
-        cur_res = []
+        ind = 0
+        cur = []
         num = str(num)
+        n = len(nums)
         #构造递归
-        def dfs(cur_id, cur_res):
+        def dfs(ind, cur):
             #终止条件
-            if cur_id == len(num):
-                res.append(cur_res)
+            if ind == n:
+                res.append(cur)
                 return
             #情况1
-            dfs(cur_id+1, cur_res+[num[cur_id]])
+            dfs(ind+1, cur+[num[ind]])
             #情况2
-            if 10<=int(num[cur_id:cur_id+2]) <=25:
-                dfs(cur_id+2, cur_res+[num[cur_id:cur_id+2]])
+            if 10<= int(num[ind:ind+2]) <=25:
+                dfs(ind+2, cur+[num[ind:ind+2]])
         #调用递归
-        dfs(cur_id, cur_res)
+        dfs(ind, cur)
         return len(res)
-```
+```