diff --git a/problems/0841.钥匙和房间.md b/problems/0841.钥匙和房间.md
index 2ce9d343..caa0edaf 100644
--- a/problems/0841.钥匙和房间.md
+++ b/problems/0841.钥匙和房间.md
@@ -212,7 +212,7 @@ func canVisitAllRooms(rooms [][]int) bool {
 
 	visited := make([]bool, len(rooms));
 
-    dfs(0, rooms, visited);
+	dfs(0, rooms, visited);
 
 	//检查是否都访问到了
 	for i := 0; i < len(visited); i++ {
diff --git a/problems/0844.比较含退格的字符串.md b/problems/0844.比较含退格的字符串.md
index e6bf3493..74455ace 100644
--- a/problems/0844.比较含退格的字符串.md
+++ b/problems/0844.比较含退格的字符串.md
@@ -188,8 +188,49 @@ class Solution {
 
 Python：
 
+python3
+
+```python
+class Solution:
+
+    def get_string(self, s: str) -> str :
+        bz = []
+        for i in range(len(s)) :
+            c = s[i]
+            if c != '#' :
+                bz.append(c) # 模拟入栈
+            elif len(bz) > 0: # 栈非空才能弹栈
+                bz.pop() # 模拟弹栈
+        return str(bz)
+
+    def backspaceCompare(self, s: str, t: str) -> bool:
+        return self.get_string(s) == self.get_string(t)
+        pass
+```
+
+
 Go：
 
+```go
+
+func getString(s string) string {
+	bz := []rune{}
+	for _, c := range s {
+		if c != '#' {
+			bz = append(bz, c); // 模拟入栈
+		} else if len(bz) > 0 { // 栈非空才能弹栈
+			bz = bz[:len(bz)-1] // 模拟弹栈
+		}
+	}
+	return string(bz)
+}
+
+func backspaceCompare(s string, t string) bool {
+	return getString(s) == getString(t)
+}
+
+```
+
 JavaScript：
 
 -----------------------