diff --git a/src/class41/Code02_StoneMerge.java b/src/class41/Code02_StoneMerge.java
index 3b3d7ae..2feaea0 100644
--- a/src/class41/Code02_StoneMerge.java
+++ b/src/class41/Code02_StoneMerge.java
@@ -1,5 +1,6 @@
 package class41;
 
+// 四边形不等式：合并石子问题
 public class Code02_StoneMerge {
 
 	public static int[] sum(int[] arr) {