class randnum {

   static int random(int lower, int upper) {

      String[] nums = new String[10];

      int div = 10;

      for (int i = 0; i < nums.length; ++i) {

         String string = "";

         while (string.length() <= 50) {

            long rand = System.currentTimeMillis();

            string = string + rand % div;

            div += rand;
         }

         nums[i] = string;
      }

      int final_number = 0;

      while (true) {

         long mult = final_number != 0 ? final_number : 1;

         long rand = mult * System.currentTimeMillis() % 10;
         long rand1 = mult * 1 * rand * System.currentTimeMillis() % 10;
         long rand2 = mult * 2 * rand * System.currentTimeMillis() % 10;
         long rand3 = mult * 4 * rand * System.currentTimeMillis() % 10;
         long rand4 = mult * 7 * rand * System.currentTimeMillis() % 10;
         long rand5 = mult * 9 * rand * System.currentTimeMillis() % 10;
         long rand6 = rand < 5 ? 1 : 0;

         long num = rand1 + rand2 + rand3 + rand4 + rand5 + rand6;

         if (num < 0) num *= -1;

         final_number += Integer.parseInt(nums[(int)rand].substring((int)num, (int)num + 1));

         int lowerMod = 0;
         for (int i = 0; i < num; i++) lowerMod += upper / (int)(num + 3);

         if (final_number >= lower + lowerMod && final_number <= upper) break;
      }

      return final_number;
   }

   public static void main(String... args) {

      for (int i = 0; i < 10; i++)
         System.out.println("RANDOM NUMBER: " + random(0, 100));

      System.exit(0);
      return;
   }

}