diff --git a/problems/0491.递增子序列.md b/problems/0491.递增子序列.md
index 436dbf01..d6c6b9c9 100644
--- a/problems/0491.递增子序列.md
+++ b/problems/0491.递增子序列.md
@@ -139,6 +139,8 @@ public:
     }
 };
 ```
+* 时间复杂度: O(n * 2^n)
+* 空间复杂度: O(n)
 
 ## 优化