using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter 3 int numbers");

        int num1=int.Parse(Console.ReadLine());

        int num2=int.Parse(Console.ReadLine());

        int num3=int.Parse(Console.ReadLine());

        if ((num1>num2)&&(num1>num3))

            {

                Console.Write("num1 is the biggest number");

            }

        if ((num2>num1)&&(num2>num3))

        {

            Console.Write("num2 is the biggest number");

        }

    }

}

​