using System;

public class Program

{

    public static decimal? Min(decimal? val1, decimal? val2)

    {

        return Nullable.Compare(val1, val2) < 0 ?

                val1:

                val2;

    }

    public static void Main()

    {

        Console.WriteLine("Min value: " + Min(-25, -50));

        Console.WriteLine("Min value: " + Min(-50, -25));

        Console.WriteLine("Min value: " + Min(null, -50));

        Console.WriteLine("Min value: " + Min(-25, null));

        Console.WriteLine("Min value: " + Min(null, null));

    }

}