diff --git a/Main.java b/Main.java
new file mode 100644
index 0000000..bbbdad9
--- /dev/null
+++ b/Main.java
@@ -0,0 +1,47 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package pkg2powern;
+/**
+ *
+Ebtsam FATHY
+*/
+  import java.util.Scanner;
+
+public class Main {
+
+    /**
+     * @param args the command line arguments
+     */
+   
+
+    public static void main(String[] args) {
+
+      int N,pow;
+      int Result=1;
+      Scanner sc=new Scanner(System.in);
+      System.out.println("enter the number");
+      N=sc.nextInt();
+       System.out.println("enter the power");
+      pow=sc.nextInt();
+      if(N>=0&&pow==0){
+          Result=1;
+      }
+      if(N==0&&pow>=1){
+          Result=0;
+      }
+      else{
+          int i=1;
+          while(i<=pow){
+              Result=Result*N;
+              i++;
+          }
+      }
+      System.out.println( N+"^"+pow+"="+Result);
+          
+      }
+    }
+    
+
diff --git a/src/CircleCircumference.java b/src/CircleCircumference.java
new file mode 100644
index 0000000..e9fb7f0
--- /dev/null
+++ b/src/CircleCircumference.java
@@ -0,0 +1,11 @@
+
+public class CircleCircumference implements ISubscriber {
+
+	@Override
+	public void notifySubscriber(String input) {
+		// TODO Auto-generated method stub
+		double r=Double.parseDouble(input);
+		System.out.println("circle circumference = "+(2*3.14*r));
+	}
+
+}
diff --git a/src/LucasSeries.java b/src/LucasSeries.java
new file mode 100644
index 0000000..1a968cf
--- /dev/null
+++ b/src/LucasSeries.java
@@ -0,0 +1,17 @@
+public class LucasSeries implements ISubscriber {
+    public static int lucas_series(int number) { 
+        if (number == 0) 
+            return 2; 
+        if (number == 1) 
+            return 1; 
+        return lucas_series(number - 1) + lucas_series(number - 2); 
+    } 
+
+    @Override
+    public void notifySubscriber(String input) {
+       int Lenght = Integer.parseInt(input);
+       System.out.println("Hello, I am really a simple Lucas series and I am notified with " + input);
+       System.out.println("LUcas Number Is : "+lucas_series(Lenght));
+    }
+    
+}
diff --git a/src/Main.java b/src/Main.java
deleted file mode 100644
index 9b8c2b0..0000000
--- a/src/Main.java
+++ /dev/null
@@ -1,17 +0,0 @@
-import java.util.Scanner;
-
-public class Main {
-	private static ISubscriber subscribers [] = {
-			new SimpleSubscriber(),
-			new ReallySimpleSubscriber(),
-	};
-	public static void main(String[] args) {
-		Topic mathTopic = new Topic();
-		for (ISubscriber sub : subscribers) {
-			mathTopic.addSubscriber(sub);
-		}
-		Scanner sc = new Scanner(System.in);
-		String input = sc.next();
-		mathTopic.dispatchEvent(input);
-	}
-}
diff --git a/src/SphereCircumference.java b/src/SphereCircumference.java
new file mode 100644
index 0000000..8304e05
--- /dev/null
+++ b/src/SphereCircumference.java
@@ -0,0 +1,8 @@
+
+public class SphereCircumference implements ISubscriber {
+	
+	 public void notifySubscriber(String input) {
+	        double R = Double.parseDouble(input);
+	        System.out.println("Sphere Circumference is  = " + (2*3.14*R));
+}
+}