class Program
{
static void Main(string[] args)
        {
            Console.WriteLine("Enter kills amount");
            double kills = double.Parse(Console.ReadLine());
            Console.WriteLine("Enter deaths amount");
            double deaths = double.Parse(Console.ReadLine());
            Console.WriteLine("Enter assists amount");
            double assists = double.Parse(Console.ReadLine());

            double kdaresult = 0d;
            Kda n = new Kda();
            kdaresult = n.WriteKDA(kills, deaths, assists);
            Console.WriteLine("KDA is {0}", Math.Round(kdaresult, 2));

            Console.ReadKey();
        }
}

class Kda
    {
        public double WriteKDA(double kills, double deaths, double assists)
        {

            double result = 0d;
            if (deaths > 0)
                result = (kills + assists) / deaths;
            else
                result = kills + assists;

            return result;
        }
    }