using System;

public class Program

{

    static long _primaryForce = 1;

    static long _secondaryForce = 2;

    static long _mass = 100;

    static int _delay = 20;

    static double _primaryAcc = _primaryForce / _mass;

    static double _secondaryAcc = (_primaryForce + _secondaryForce) / _mass;

    double _primaryVel = _primaryAcc * _delay;

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

    public double GetDistanceTravelled (int time) 

    {

        double result = CalculatePrimaryResult(time);

        if (time - _delay > 0) 

        {

            result += CalculateSecondaryResult(time);

        }

        return result;

    }

    private double CalculatePrimaryResult (int time)

    {

        int primaryTime = Math.Min(time, _delay);

        return 0.5 * _primaryAcc * primaryTime * primaryTime;

    }

    private double CalculateSecondaryResult (int time)

    {

        int secondaryTime = time - _delay;

        return _primaryVel * secondaryTime + 0.5 * _secondaryAcc * secondaryTime * secondaryTime; 

    }

}