public static void Main(string[] args)
{
while (true)
{
string input = Console.ReadLine();
ulong number = ulong.Parse(input);
ulong res = Fibonachchi.CalcFib(number);
Console.WriteLine(res);
}
}
public void test1()
{
Assert.AreEqual(3, Fibonachchi.CalcFib(4));
Assert.AreEqual(3736710778780434371, Fibonachchi.CalcFib(100));
}