Merge pull request #1691 from AlgorithmWithGod/Seol-JY

[20251216] BOJ / G5 / 멀티버스 Ⅱ / 설진영

Author: ShinHeeEul

Seol-JY/202512/16 BOJ G5 멀티버스 Ⅱ.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);
+    }
+}
+```