diff --git a/20240826/CSP2020-senior/ans.txt b/20240826/CSP2020-senior/ans.txt
index 61781d0..85a612d 100644
--- a/20240826/CSP2020-senior/ans.txt
+++ b/20240826/CSP2020-senior/ans.txt
@@ -12,4 +12,4 @@
 12. D
 13. B
 14. C
-15.?D
\ No newline at end of file
+15.?D