using System;

public class Program

{

    public static void Main()

    {

        var inputValues = new[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

        for (var i = 0; i < inputValues.Length; i++)

        {

            Console.WriteLine(ReconnectionStrategy.GetRetryTime(15, inputValues[i]));

        }

    }

        internal class ReconnectionStrategy

    {

​

        static Random _random = new Random();

        public static double GetBackoffCoefficient(int retryCount)

        {

            return Math.Min((retryCount + 2) / 3, 2);

        }

​

        public static double GetJitterCoefficient()

        {

            return 1 - (_random.NextDouble() * 0.2);

        }

​

        public static double GetRetryTime(double initValue, int retryCount)

        {

            return initValue * GetBackoffCoefficient(retryCount) * GetJitterCoefficient();

        }

    }

}