diff --git a/OJ notes/pages/Leetcode 01-Matrix.md b/OJ notes/pages/Leetcode 01-Matrix.md
index 6f497f4..425b2e6 100644
--- a/OJ notes/pages/Leetcode 01-Matrix.md	
+++ b/OJ notes/pages/Leetcode 01-Matrix.md	
@@ -82,6 +82,9 @@ I tried with DFS, but
 
 #### BFS
 
+> [!tip]
+> Search from 0 instead of 1, can make it easier.
+
 Start searching from 0s, because the search direction matters.
 
 pseudo code: