diff --git a/14lanqiao/test7-2.cpp b/14lanqiao/test7-2.cpp
index 4adb9b4..62886bb 100644
--- a/14lanqiao/test7-2.cpp
+++ b/14lanqiao/test7-2.cpp
@@ -1,4 +1,4 @@
-// lanqiao3514 字串简写(前缀和优化)
+//  lanqiao3514 字串简写(前缀和优化)
 #include<bits/stdc++.h>
 using namespace std;
 #define int long long