using System;

​

public class Program

{

    public static void Main()

    {

        double theta = 0;

        double delta = 0;

        int maxRadius = 80;

        int stepSize = 20;

        double radialMoveScale = 0.2;

        int x = 0;

        int y = 0;

        int r = 0;

        for (r = stepSize; r <= maxRadius; r += stepSize)

        {

            x = 0;

            for (int up = 0; up < stepSize; up += (int)((double)stepSize * radialMoveScale))

            {

                y =  r - stepSize + up;

                Console.WriteLine("(" + x + ", " + y + ")");

            }

            delta = (double)((double)stepSize / (double)r);

            for (theta = 0; theta < 2 * Math.PI; theta += (delta * radialMoveScale))

            {

                x = (int)(Math.Sin(theta) * r);

                y = (int)(Math.Cos(theta) * r);

                Console.WriteLine("(" + x + ", " + y + ")");

            }

        }

    }

}