diff --git "a/LiiNi-coder/202508/13 BOJ \354\203\230\355\204\260.md" "b/LiiNi-coder/202508/13 BOJ \354\203\230\355\204\260.md"
new file mode 100644
index 00000000..dc7a2310
--- /dev/null
+++ "b/LiiNi-coder/202508/13 BOJ \354\203\230\355\204\260.md"	
@@ -0,0 +1,53 @@
+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.*;
+
+public class Main {
+    private static BufferedReader br;
+    private static StringTokenizer st;
+
+    public static void main(String[] args) throws IOException {
+        br = new BufferedReader(new InputStreamReader(System.in));
+        st = new StringTokenizer(br.readLine());
+        int n = Integer.parseInt(st.nextToken());
+        int k = Integer.parseInt(st.nextToken());
+        Queue<Integer> q = new LinkedList<>();
+        HashSet<Integer> visited = new HashSet<>();
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < n; i++) {
+            int x = Integer.parseInt(st.nextToken());
+            q.offer(x);
+            visited.add(x);
+        }
+
+        long answer = 0;
+        int distance = 1;
+        int builtCount = 0;
+        int[] dxs = { -1, 1 };
+
+        outer: // naming가능한 break문
+        while (!q.isEmpty()) {
+            int size = q.size();
+            for (int t = 0; t < size; t++) {
+                int x = q.poll();
+                for (int d : dxs) {
+                    int nx = x + d;
+                    if (visited.contains(nx))
+                        continue;
+                    visited.add(nx);
+                    q.offer(nx);
+                    answer += distance;
+                    builtCount++;
+                    if (builtCount == k)
+                        break outer;
+                }
+            }
+            distance++;
+        }
+        System.out.println(answer);
+        br.close();
+    }
+}
+```