using System;

​

public class Program

{

    public static void Main()

    {

        var wds = new[]{1, 2, 359, 358};

        double sumX = 0, sumY = 0;

        int count = 0;

        for (int i = 0; i < wds.Length; i++)

        {

            sumX += Math.Sin(wds[i] * Math.PI / 180);

            sumY += Math.Cos(wds[i] * Math.PI / 180);

            count++;

        }

​

        if (count > 0)

        {

            var avgX = sumX / count;

            var avgY = sumY / count;

            var wd = (int)(Math.Atan(avgX / avgY) / Math.PI * 180);

            Console.WriteLine(wd);

        }

    }

}