static void Main(string[] args)
{
Console.Out.Write("Problem Number : ");
int problem = Int32.Parse(Console.ReadLine());
Problems p = new Problems();
Stopwatch watch = new Stopwatch();
watch.Start();
long res = p.Problem(problem);
watch.Stop();
Console.Out.WriteLine("Result : " + res.ToString() + " in " + watch.ElapsedMilliseconds + " ms");
Clipboard.SetText(res.ToString());
Console.ReadLine();
}
