diff --git "a/0224LJH/202511/11 BOJ \353\252\250\353\217\205.md" "b/0224LJH/202511/11 BOJ \353\252\250\353\217\205.md"
new file mode 100644
index 00000000..8a83f05a
--- /dev/null
+++ "b/0224LJH/202511/11 BOJ \353\252\250\353\217\205.md"	
@@ -0,0 +1,42 @@
+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.*;
+import java.util.*;
+
+public class Main {
+	
+	static int cnt;
+	static PriorityQueue<Integer> pq = new PriorityQueue<>();
+			
+	public static void main (String[] args) throws NumberFormatException, IOException {
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+		cnt = Integer.parseInt(br.readLine());
+		for (int i = 0; i < cnt; i++) {
+			pq.add(Integer.parseInt(br.readLine()));
+		}
+		
+		int goal = 1;
+		long hackerCnt = 0;
+		
+		while(!pq.isEmpty()) {
+			if (goal == pq.peek()) {
+				goal++;
+				pq.poll();
+			} else if (goal > pq.peek()) {
+				pq.poll();
+			} else {
+				hackerCnt += pq.peek()-goal;
+				pq.poll();
+				goal++;
+			}
+		}
+		
+		System.out.println(hackerCnt);
+		
+	}
+
+}
+
+```