From 50c68e096f0d4a80e17ec63985b05b5042dd26e7 Mon Sep 17 00:00:00 2001
From: songyc macbook <gitea@gitea>
Date: Fri, 13 Feb 2026 17:32:50 +0900
Subject: [PATCH] baekjoon 20260212

---
 code_study/Baekjoon/java/_9252.java | 50 +++++++++++++++++++++++++++++
 code_study/Baekjoon/python/2490.py  |  6 ++++
 2 files changed, 56 insertions(+)
 create mode 100644 code_study/Baekjoon/java/_9252.java
 create mode 100644 code_study/Baekjoon/python/2490.py

diff --git a/code_study/Baekjoon/java/_9252.java b/code_study/Baekjoon/java/_9252.java
new file mode 100644
index 0000000..9fcb9ae
--- /dev/null
+++ b/code_study/Baekjoon/java/_9252.java
@@ -0,0 +1,50 @@
+import java.util.*;
+
+public class _9252 {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        String a = sc.nextLine();
+        String b = sc.nextLine();
+        sc.close();
+
+        int la = a.length(), lb = b.length();
+
+        int[][] dp = new int[la+1][lb+1];
+
+        for(int i=1; i<=la; i++) {
+            for(int j=1; j<=lb; j++) {
+                if(a.charAt(i-1) == b.charAt(j-1)) {
+                    dp[i][j] = Math.max(dp[i-1][j-1] + 1, dp[i][j]);
+                }
+                else {
+                    dp[i][j] = Math.max(dp[i][j], Math.max(dp[i-1][j], dp[i][j-1]));
+                }
+            }
+        }
+
+        System.out.println(dp[la][lb]);
+
+        if(dp[la][lb] != 0) {
+            int pa = la, pb = lb;
+            String reverse = "";
+
+            while(pa != 0 && pb != 0) {
+                if(dp[pa-1][pb] == dp[pa][pb]) {
+                    pa--;
+                }
+                else if (dp[pa][pb-1] == dp[pa][pb]){
+                    pb--;
+                }
+                else {
+                    reverse += a.charAt(pa-1);
+                    pa--; pb--;
+                }
+            }
+
+            String res = "";
+            for(int i=dp[la][lb]-1; i >= 0 ; i--) res += reverse.charAt(i);
+
+            System.out.println(res);
+        }
+    }
+}
diff --git a/code_study/Baekjoon/python/2490.py b/code_study/Baekjoon/python/2490.py
new file mode 100644
index 0000000..fb44e6c
--- /dev/null
+++ b/code_study/Baekjoon/python/2490.py
@@ -0,0 +1,6 @@
+res = ['D', 'C', 'B', 'A', 'E']
+ans = []
+for _ in range(3) :
+    n = sum(list(map(int, input().split())))
+    ans.append(res[n])
+print('\n'.join(ans))
\ No newline at end of file