From 7bf103119ea00bb196157112c2e95b1c1c411774 Mon Sep 17 00:00:00 2001
From: llIllIllIllIllIllIllIllI <_@seol.pro>
Date: Tue, 16 Dec 2025 23:46:08 +0900
Subject: [PATCH] =?UTF-8?q?[20251216]=20BOJ=20/=20G5=20/=20=EB=A9=80?=
 =?UTF-8?q?=ED=8B=B0=EB=B2=84=EC=8A=A4=20=E2=85=A1=20/=20=EC=84=A4?=
 =?UTF-8?q?=EC=A7=84=EC=98=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...0\353\262\204\354\212\244 \342\205\241.md" | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 "Seol-JY/202512/16 BOJ G5 \353\251\200\355\213\260\353\262\204\354\212\244 \342\205\241.md"

diff --git "a/Seol-JY/202512/16 BOJ G5 \353\251\200\355\213\260\353\262\204\354\212\244 \342\205\241.md" "b/Seol-JY/202512/16 BOJ G5 \353\251\200\355\213\260\353\262\204\354\212\244 \342\205\241.md"
new file mode 100644
index 00000000..ed947f5f
--- /dev/null
+++ "b/Seol-JY/202512/16 BOJ G5 \353\251\200\355\213\260\353\262\204\354\212\244 \342\205\241.md"	
@@ -0,0 +1,46 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        
+        int M = Integer.parseInt(st.nextToken());
+        int N = Integer.parseInt(st.nextToken());
+        
+        List<List<Integer>> spaces = new ArrayList<>();
+        
+        for (int i = 0; i < M; i++) {
+            st = new StringTokenizer(br.readLine());
+            List<Integer> space = new ArrayList<>();
+            Set<Integer> set = new HashSet<>();
+            
+            for (int j = 0; j < N; j++) {
+                int planet = Integer.parseInt(st.nextToken());
+                set.add(planet);
+                space.add(planet);
+            }
+            
+            List<Integer> sorted = new ArrayList<>(set);
+            Collections.sort(sorted);
+            
+            for (int j = 0; j < N; j++) {
+                int idx = Collections.binarySearch(sorted, space.get(j));
+                space.set(j, idx);
+            }
+            spaces.add(space);
+        }
+        
+        int answer = 0;
+        for (int i = 0; i < M; i++) {
+            for (int j = i + 1; j < M; j++) {
+                if (spaces.get(i).equals(spaces.get(j))) answer++;
+            }
+        }
+        
+        System.out.println(answer);
+    }
+}
+```