diff --git a/SeongHoonC/README.md b/SeongHoonC/README.md
index 9741322..8c01890 100644
--- a/SeongHoonC/README.md
+++ b/SeongHoonC/README.md
@@ -11,5 +11,5 @@
 | 7차시 | 2024.02.08 | DP | <a href="https://www.acmicpc.net/problem/1932"></a> | https://github.com/AlgoLeadMe/AlgoLeadMe-6/pull/23 |
 | 8차시 | 2024.02.14 | 정렬 | <a href="https://www.acmicpc.net/problem/18870"></a> | https://github.com/AlgoLeadMe/AlgoLeadMe-6/pull/26 |
 | 9차시 | 2024.02.21 | bfs | <a href="https://www.acmicpc.net/problem/21736"></a> | https://github.com/AlgoLeadMe/AlgoLeadMe-6/pull/35 |
-| 9차시 | 2024.02.21 | bfs | <a href="https://www.acmicpc.net/problem/1931"></a> | https://github.com/AlgoLeadMe/AlgoLeadMe-6/pull/38 |
+| 9차시 | 2024.02.23 | 그리디 | <a href="https://www.acmicpc.net/problem/1931"></a> | https://github.com/AlgoLeadMe/AlgoLeadMe-6/pull/38 |
 ---