using System;

abstract class Modify

{

    public void rearrangeArr(int[] a)

    {

        int size = a.Length;

        for (int i = 0; i < size - 2; i += 2)

        {

            int t = a[i];

            a[i] = a[i + 1];

            a[i + 1] = t;

        }

        Console.Write("The resulting array is: ");

        for (int i = 0; i < size; i++)

        {

            Console.Write(a[i] + " ");

        }

    }

​

}

​

class Inheritor : Modify

{

​

​

}

​

​

​

​

public class Program

{

    public static void Main(String[] args)

    {

​

        string n;

        Console.WriteLine("Input:");

        n = Console.ReadLine();

        string[] tokens = n.Split(' ');

        int[] numbers = Array.ConvertAll(tokens, int.Parse);

​

        Inheritor test1 = new Inheritor();

        test1.rearrangeArr(numbers);

    }

}