diff --git "a/JHLEE325/202512/09 BOJ G1 K\353\262\210\354\247\270 \354\210\230.md" "b/JHLEE325/202512/09 BOJ G1 K\353\262\210\354\247\270 \354\210\230.md"
new file mode 100644
index 00000000..0663e860
--- /dev/null
+++ "b/JHLEE325/202512/09 BOJ G1 K\353\262\210\354\247\270 \354\210\230.md"	
@@ -0,0 +1,35 @@
+```java
+import java.io.*;
+
+public class Main {
+
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        int N = Integer.parseInt(br.readLine());
+        long K = Long.parseLong(br.readLine());
+
+        long left = 1;
+        long right = K;
+        long answer = 0;
+
+        while (left <= right) {
+            long mid = (left + right) / 2;
+            long count = 0;
+
+            for (int i = 1; i <= N; i++) {
+                count += Math.min(N, mid / i);
+            }
+
+            if (count >= K) {
+                answer = mid;
+                right = mid - 1;
+            } else {
+                left = mid + 1;
+            }
+        }
+
+        System.out.println(answer);
+    }
+}
+```