using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;

namespace CSharp_Shell
{
    class Vector2 {

        public int x, y;

        public Vector2(int x, int y) {
            this.x = x;
            this.y = y;
        }

        public void clear(){
            x = 0;
            y = 0;
        }
    }

    class TouchControl {

        private int maxSpeed;
        private int maxLengthVector = 0;
        private Vector2 pos = new Vector2(0,0);

        public TouchControl(int max_speed, int width){
            this.maxLengthVector = width / 3;
            this.maxSpeed = max_speed;
        }

        private int getSpeed(int d){
            d = d < 0 ? (-d > maxLengthVector ? -maxLengthVector : d) : (d > maxLengthVector ? maxLengthVector : d);
            return maxSpeed * d / maxLengthVector;
        }

        public Vector2 downTouch(int x, int y){
            if (pos.x == 0) pos.x = x;
            if (pos.y == 0) pos.y = y;
            return new Vector2(getSpeed(pos.x >= x ? -(pos.x - x) : x - pos.x), getSpeed(pos.y >= y ? -(pos.y - y) : y - pos.y));
        }

        public void upTouch(){
            pos.clear();
        }
    }

    public static class Program
    {
        public static void Main()
        {
            TouchControl th = new TouchControl(15, 400);
            int x = 100, y = 200;
            for (int i = 20; i > 0; i--){
                x -= 2;
                y -= 1;
                Vector2 z = th.downTouch(x, y);
                Console.WriteLine(z.x+" "+z.y);
            }
            th.upTouch();
        }
    }
}