using System;

​

class Program

{

    static void Main(string[] args)

    {

        var h1 = new Heading(355f);

        var h2 = new Heading(10f);

        var h3 = new Heading(0f);

        var h4 = new Heading(318f);

        var h5 = new Heading(318f);

        Console.WriteLine(h4 == h5);

        Console.WriteLine((h1 + h2).Degree);

        Console.WriteLine((h3 - h4).Degree);

    }

}

​

struct Heading

{

    private const float MaxDegrees = 360;

    public float Degree {get; set;}

    public Heading(float heading)

    {

        Degree = heading;

    }

    public static Heading operator +(Heading a, Heading b) 

    {

        var val = (a.Degree + b.Degree) % MaxDegrees;

        return new Heading(val);

    }

    public static Heading operator -(Heading a, Heading b)

    {

        var difference = Math.Abs(a.Degree - b.Degree);

        if (difference > 180)

            return new Heading(MaxDegrees - difference);

        return new Heading(difference);

    }

    public static bool operator ==(Heading a, Heading b)

    {

        return a.Degree == b.Degree;

    }

    public static bool operator !=(Heading a, Heading b)

    {

        return !(a == b);

    }

    public override bool Equals(object other)

    {

        if (other is not Heading)

            return false;

        return ((Heading) other).Degree == Degree;

    }

    public override int GetHashCode()

    {

        // Oerflow is ok here, just wrap

        unchecked

        {

            var hash = 17;

            hash = hash * 23 + Degree.GetHashCode();

            return hash;

        }

    }

}