From 34e07f6e7ea7430e5646aa51b4f6f196015a576a Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Fri, 18 Jul 2025 23:17:02 +0800
Subject: [PATCH] feat: update readme

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 02a1f1e..124b9e6 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@
 Mathematics:
 - Software
     - https://www.sagemath.org/
+    - https://sagecell.sagemath.org/
 - Books
     - https://github.com/OI-wiki/OI-wiki
     - https://github.com/valeman/Awesome_Math_Books