diff --git a/problems/0657.机器人能否返回原点.md b/problems/0657.机器人能否返回原点.md
index ba682a33..805a81e6 100644
--- a/problems/0657.机器人能否返回原点.md
+++ b/problems/0657.机器人能否返回原点.md
@@ -91,6 +91,8 @@ class Solution {
 ## Python
 
 ```python
+# 时间复杂度：O(n)
+# 空间复杂度：O(1)
 class Solution:
     def judgeCircle(self, moves: str) -> bool:
         x = 0 # 记录当前位置
@@ -115,6 +117,19 @@ class Solution:
 ## JavaScript
 
 ```js
+// 时间复杂度：O(n)
+// 空间复杂度：O(1)
+var judgeCircle = function(moves) {
+    var x = 0; // 记录当前位置
+    var y = 0;
+    for (var i = 0; i < moves.length; i++) {
+        if (moves[i] == 'U') y++;
+        if (moves[i] == 'D') y--;
+        if (moves[i] == 'L') x++;
+        if (moves[i] == 'R') x--;
+    }
+    return x == 0 && y == 0;
+};
 ```
 
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