public class Random200_300 {

     public static void main(String[] args) {

         int r1 = 0;

         while (true) {

             r1 = (int)(Math.random() * 10) * 10 + 200;

             if ((200 <= r1) && (r1 < 300)) {

                 System.out.println(r1);

             } else {

                 System.out.println("Error!");

                 break;

             }

             try {

                 Thread.sleep(200);

             } catch (InterruptedException e) {

                 e.printStackTrace();

             }

         }

     }

 }