using System;
public class Program
{
public static void Main()
TimeSpan t1 = TimeSpan.FromHours(1);
TimeSpan t2 = TimeSpan.FromHours(2);
double v = 1800;
Console.WriteLine(t1.Subtract(t2).Ticks);
Console.WriteLine(t2.Subtract(t1).TotalSeconds/v);
}