public static void Main()
num = Console.ReadLine();
num1 = Convert.ToInt32(num);
num = Console.ReadLine();
num2 = Convert.ToInt32(num);
num = Console.ReadLine();
num3 = Convert.ToInt32(num);
Console.Write("{0} is the largest!\n", num1);
Console.Write("{0} is the largest!\n", num3);
Console.Write("{0} is the largest!\n", num2);
Console.Write("{0} is the largest!\n", num3);