From df4cc041d263facd7b9a742ab8ca90d9813b577b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EA=B0=95=EC=8B=A0=EC=A7=80?=
 <101992179+ksinji@users.noreply.github.com>
Date: Thu, 18 Dec 2025 17:04:43 +0900
Subject: [PATCH] =?UTF-8?q?[20251218]=20BOJ=20/=20G5=20/=20A=EC=99=80=20B?=
 =?UTF-8?q?=20/=20=EA=B0=95=EC=8B=A0=EC=A7=80?=
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---
 "ksinji/202512/18 BOJ A\354\231\200 B.md" | 39 +++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 "ksinji/202512/18 BOJ A\354\231\200 B.md"

diff --git "a/ksinji/202512/18 BOJ A\354\231\200 B.md" "b/ksinji/202512/18 BOJ A\354\231\200 B.md"
new file mode 100644
index 00000000..a52ee632
--- /dev/null
+++ "b/ksinji/202512/18 BOJ A\354\231\200 B.md"	
@@ -0,0 +1,39 @@
+```java
+import java.io.*;
+
+public class Main {
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        String s = br.readLine();
+        String t = br.readLine();
+       
+        char[] a = t.toCharArray();
+        int l = 0;
+        int r = a.length - 1;
+        boolean dir = false;
+
+        while (r - l + 1 > s.length()) {
+            char last = dir ? a[l] : a[r];
+            if (last == 'A') {
+                if (dir) l++;
+                else r--;
+            } else {
+                if (dir) l++;
+                else r--;
+                dir = !dir;
+            }
+        }
+
+        for (int i = 0; i < s.length(); i++) {
+            char c = dir ? a[r - i] : a[l + i];
+            if (c != s.charAt(i)) {
+                System.out.print(0);
+                return;
+            }
+        }
+
+        System.out.print(1);
+    }
+}
+```
\ No newline at end of file