From 916718824bd6fe521ee2164b29f71d11633828a7 Mon Sep 17 00:00:00 2001
From: Yuhao Ju <juguaguaji@gmail.com>
Date: Sat, 1 Apr 2023 12:47:36 +0800
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---
 problems/0020.有效的括号.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/problems/0020.有效的括号.md b/problems/0020.有效的括号.md
index a25129c5..213d61b7 100644
--- a/problems/0020.有效的括号.md
+++ b/problems/0020.有效的括号.md
@@ -135,6 +135,9 @@ public:
 };
 
 ```
+* 时间复杂度: O(n)
+* 空间复杂度: O(n)
+
 技巧性的东西没有固定的学习方法，还是要多看多练，自己灵活运用了。