[20251219] BOJ / G5 / 회문 / 김민진

zinnnn37/202512/19 BOJ G5 회문.md

@@ -0,0 +1,43 @@
+```java
+import java.io.*;
+
+public class BJ_17609_회문 {
+
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static final StringBuilder  sb = new StringBuilder();
+
+    private static int    N;
+    private static String input;
+
+    public static void main(String[] args) throws IOException {
+        N = Integer.parseInt(br.readLine());
+
+        while (N-- > 0) {
+            input = br.readLine();
+            sb.append(sol(0, input.length() - 1, 0)).append("\n");
+        }
+        bw.write(sb.toString());
+        bw.flush();
+        br.close();
+        bw.close();
+    }
+
+    private static int sol(int left, int right, int cnt) {
+        if (cnt >= 2) {
+            return 2;
+        }
+
+        while (left < right) {
+            if (input.charAt(left) == input.charAt(right)) {
+                left++;
+                right--;
+            } else {
+                return Math.min(sol(left + 1, right, cnt + 1), sol(left, right - 1, cnt + 1));
+            }
+        }
+        return cnt;
+    }
+
+}
+```