namespace Chess
{
    public class Vector
    {
        private int x;
        private int y;
        public int X
        {
            get { return x; }
            set { x = value; }
        }
        public int Y
        {
            get { return y; }
            set { y = value; }
        }
        public Vector(int x, int y)
        {
            this.x = x;
            this.y = y;
        }
        public static Vector operator +(Vector v1, Vector v2) => new Vector(v1.x + v2.x, v1.y + v2.y);
        public static Vector operator -(Vector v1, Vector v2) => new Vector(v1.x - v2.x, v1.y - v2.y);
        public static Vector operator /(Vector v, int n) => new Vector(v.x / n, v.y / n);
        public static Vector operator *(Vector v, int n) => new Vector(v.x * n, v.y * n);
        public static Vector operator -(Vector v) => new Vector(-v.x, -v.y);
        public static Vector operator +(Vector v) => v;
        public static bool operator ==(Vector v1, Vector v2)
        {
            if (v1 as object == null || v2 as object == null)
            {
                return false;
            }
            else
            {
                return v1.x == v2.x && v1.y == v2.y;
            }
        }
        public static bool operator !=(Vector v1, Vector v2)
        {
            if (v1 as object == null || v2 as object == null)
            {
                if (v1 as object == null && v2 as object == null)
                {
                    return true;
                }
                return false;
            }
            else
            {
                return v1.x != v2.x || v1.y != v2.y;
            }
        }
        public override bool Equals(object obj)
        {
            try
            {
                return this == obj as Vector;
            }
            catch (System.Exception)
            {
                return false;
            }
        }
        public override string ToString() => $"({x}, {y})";
    }
}