public class CopyOfRobotWalk {
    public static void main(String[] args) {
        number();
    }
    public static void number() {
        int average = 0;
        for (int i = 1; i <= 20; i++) {
            double d = (Math.random()*4)-1;
            int num = (int)(d*20);
            average = num;
            System.out.println("On simulation " + i + " the robot went " + num + " steps in 20 tries.");
        }
        System.out.print(average);
    }
}