diff --git a/problems/0150.逆波兰表达式求值.md b/problems/0150.逆波兰表达式求值.md
index f0323bc4..09cc4f96 100644
--- a/problems/0150.逆波兰表达式求值.md
+++ b/problems/0150.逆波兰表达式求值.md
@@ -113,6 +113,9 @@ public:
 };
 
 ```
+* 时间复杂度: O(n)
+* 空间复杂度: O(n)
+
 
 ## 题外话