diff --git a/LiiNi-coder/202509/28  BOJ CCW.md b/LiiNi-coder/202509/28  BOJ CCW.md
new file mode 100644
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+++ b/LiiNi-coder/202509/28  BOJ CCW.md	
@@ -0,0 +1,32 @@
+```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;
+        
+        st = new StringTokenizer(br.readLine());
+        long x1 = Long.parseLong(st.nextToken());
+        long y1 = Long.parseLong(st.nextToken());
+        
+        st = new StringTokenizer(br.readLine());
+        long x2 = Long.parseLong(st.nextToken());
+        long y2 = Long.parseLong(st.nextToken());
+        
+        st = new StringTokenizer(br.readLine());
+        long x3 = Long.parseLong(st.nextToken());
+        long y3 = Long.parseLong(st.nextToken());
+
+        long value = (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1); // 외적
+        if(value > 0) {
+            System.out.println(1);
+        }else if(value < 0) {
+            System.out.println(-1);
+        }else{
+            System.out.println(0);
+        }
+    }
+}
+```