[20250827] BOJ / G5 / A와 B 2 / 이인희

Author: LiiNi-coder

LiiNi-coder/202508/27 BOJ A와 B 2.md

@@ -0,0 +1,40 @@
+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class Main {
+    private static String S, T;
+    private static boolean isFind = false;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        S = br.readLine();
+        T = br.readLine();
+
+        dfs(T);
+        System.out.println(isFind ? 1 : 0);
+    }
+
+    private static void dfs(String cur) {
+        if (isFind)
+            return;
+        if (cur.length() == S.length()) {
+            if (cur.equals(S)) isFind = true;
+            return;
+        }
+
+        // 마지막이 A라면 A 제거
+        if (cur.charAt(cur.length() - 1) == 'A') {
+            dfs(cur.substring(0, cur.length() - 1));
+        }
+
+        // 첫 글자가 B라면 B 제거 후 뒤집기
+        if (cur.charAt(0) == 'B') {
+            StringBuilder sb = new StringBuilder(cur.substring(1));
+            dfs(sb.reverse().toString());
+        }
+    }
+}
+
+```