using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Vector3
{
    class Vector3
    {
        public double X { get; set; }
        public double Y { get; set; }
        public double Z { get; set; }

        public Vector3 (double x, double y, double z)
        {
            X = x;
            Y = y;
            Z = z;
        }

        public static Vector3 operator +(Vector3 a, Vector3 b)
        {
            return new Vector3(a.X + b.X, a.Y + b.Y, a.Z + b.Z);
        }

        public static Vector3 operator -(Vector3 a, Vector3 b)
        {
            return new Vector3(a.X - b.X, a.Y - b.Y, a.Z - b.Z);
        }

        public static Vector3 operator --(Vector3 a)
        {
            return new Vector3(a.X * (-1), a.Y * (-1), a.Z * (-1));
        }

        public static Vector3 operator *(Vector3 a, double number)
        {
            return new Vector3(a.X * number, a.Y * number, a.Z * number);
        }

        public static Vector3 operator /(Vector3 a, double number)
        {
            return new Vector3(a.X / number, a.Y / number, a.Z / number);
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Vector3 star = new Vector3(7, 8, -1);
            Vector3 neutron_star = new Vector3(12, 1, 5);

            Vector3 result_star = star + neutron_star;
            Vector3 result_star2 = star - neutron_star;
            Vector3 result_star3 = --star;
            Vector3 result_star4 = star * 4;
            Vector3 result_star5 = neutron_star / 4;

            Console.WriteLine(result_star.X);
            Console.WriteLine(result_star.Y);
            Console.WriteLine(result_star.Z);
            Console.WriteLine("-----------STAR 2----------");
            Console.WriteLine(result_star2.X);
            Console.WriteLine(result_star2.Y);
            Console.WriteLine(result_star2.Z);
            Console.WriteLine("-----------STAR 3----------");
            Console.WriteLine(result_star3.X);
            Console.WriteLine(result_star3.Y);
            Console.WriteLine(result_star3.Z);
            Console.WriteLine("-----------STAR 4----------");
            Console.WriteLine(result_star4.X);
            Console.WriteLine(result_star4.Y);
            Console.WriteLine(result_star4.Z);
            Console.WriteLine("-----------STAR 5----------");
            Console.WriteLine(result_star5.X);
            Console.WriteLine(result_star5.Y);
            Console.WriteLine(result_star5.Z);

            Console.ReadKey();
        }
    }
}