From 8264d822483c0324775a24c619cdff9a96073563 Mon Sep 17 00:00:00 2001
From: JHLEE325 <82587652+JHLEE325@users.noreply.github.com>
Date: Sun, 25 Jan 2026 17:45:13 +0900
Subject: [PATCH] =?UTF-8?q?[20260125]=20BOJ=20/=20G4=20/=20=EC=B9=B4?=
 =?UTF-8?q?=EB=93=9C=20=EC=84=9E=EA=B8=B0=20/=20=EC=9D=B4=EC=A4=80?=
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---
 ...4\353\223\234 \354\204\236\352\270\260.md" | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 "JHLEE325/202601/25 BOJ G4 \354\271\264\353\223\234 \354\204\236\352\270\260.md"

diff --git "a/JHLEE325/202601/25 BOJ G4 \354\271\264\353\223\234 \354\204\236\352\270\260.md" "b/JHLEE325/202601/25 BOJ G4 \354\271\264\353\223\234 \354\204\236\352\270\260.md"
new file mode 100644
index 00000000..e5477a10
--- /dev/null
+++ "b/JHLEE325/202601/25 BOJ G4 \354\271\264\353\223\234 \354\204\236\352\270\260.md"	
@@ -0,0 +1,55 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st;
+        int N = Integer.parseInt(br.readLine());
+
+        int[] P = new int[N];
+        int[] S = new int[N];
+        int[] cards = new int[N];
+
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < N; i++) P[i] = Integer.parseInt(st.nextToken());
+
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < N; i++) S[i] = Integer.parseInt(st.nextToken());
+
+        for (int i = 0; i < N; i++) cards[i] = i;
+
+        int[] initial = cards.clone();
+        int count = 0;
+
+        while (true) {
+            if (isTarget(cards, P)) {
+                System.out.println(count);
+                break;
+            }
+
+            int[] nextCards = new int[N];
+            for (int i = 0; i < N; i++) {
+                nextCards[S[i]] = cards[i];
+            }
+            cards = nextCards;
+            count++;
+
+            if (Arrays.equals(cards, initial)) {
+                System.out.println("-1");
+                break;
+            }
+        }
+    }
+
+    private static boolean isTarget(int[] cards, int[] P) {
+        for (int i = 0; i < cards.length; i++) {
+            if (P[cards[i]] != i % 3) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+```