diff --git a/problems/0344.反转字符串.md b/problems/0344.反转字符串.md
index 8a4fed45..44184c53 100644
--- a/problems/0344.反转字符串.md
+++ b/problems/0344.反转字符串.md
@@ -250,6 +250,20 @@ class Solution:
         s[:] = [s[i] for i in range(len(s) - 1, -1, -1)]
        
 ```
+
+（版本七） 使用reverse()
+
+```python
+class Solution:
+    def reverseString(self, s: List[str]) -> None:
+        """
+        Do not return anything, modify s in-place instead.
+        """
+        # 原地反转,无返回值
+        s.reverse()
+       
+```
+
 ### Go：
 
 ```Go
diff --git a/problems/0383.赎金信.md b/problems/0383.赎金信.md
index 3de48ce3..b800c232 100644
--- a/problems/0383.赎金信.md
+++ b/problems/0383.赎金信.md
@@ -214,6 +214,19 @@ class Solution:
         return all(ransomNote.count(c) <= magazine.count(c) for c in set(ransomNote))
 ```
 
+(版本六）使用count(简单易懂)
+
+```python3
+class Solution:
+    def canConstruct(self, ransomNote: str, magazine: str) -> bool:
+        for char in ransomNote:
+            if char in magazine and ransomNote.count(char) <= magazine.count(char):
+                continue
+            else:
+                return False
+        return True
+```
+
 ### Go：
 
 ```go