using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(t1(1));

        Console.WriteLine(t2(1));

        Console.WriteLine(t3(1));

    }

    private static int  t1(int nextNumber)

    {

         return nextNumber++;       

    }

    private static int  t2(int nextNumber)

    {

        nextNumber++;

        return nextNumber;  

    }

    private static int t3(int nextNumber)

    {

        return ++nextNumber;    

    }

}