---

using static System.Console;
namespace ConsoleApp19
{
    class Point
    {
        public int x { get; set; }
        public int y { get; set; }

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

        public static Point operator --(Point p)
        {
            p.x--;
            p.y--;
            return p;
        }
        public static Point operator ++(Point p)
        {
            p.x++;
            p.y++;
            return p;
        }
        public static Point operator -(Point p)
        {
            return new Point (-p.x,-p.y );
        }

    }
    class Vector
    {
        public int x { get; set; }
        public int y { get; set; }
        public Vector() { }

        public Vector(Point begin,Point end) 
        {
            x = end.x - begin.x;
            y = end.y - begin.y;
        }
        public static Vector operator +(Vector v1, Vector v2)
        {
            return new Vector { x = v1.x + v2.x, y = v1.y + v2.y };
        }
        public static Vector operator -(Vector v1, Vector v2)
        {
            return new Vector { x = v1.x - v2.x, y = v1.y - v2.y };
        }
        public static Vector operator *(Vector v1,int n)
        {
            v1.x = v1.x * n;
            v1.y = v1.y * n;
            return v1;
        }
        public override string ToString()
        {
            return $"vecrot x={x},y={y}";
        }
    }
    internal class Program
    {
        static void Main(string[] args)
        {
            Point p1 = new Point(2, 3);
            Point p2 = new Point(3, 1);

            Vector v1 = new Vector(p1, p2);
            Vector v2 = new Vector{x = 2, y = 3};

            WriteLine(v1 + v2);
            WriteLine(v1 - v2);
            WriteLine(v1 * 5);

        }
    }
}