/*

Write a C# Sharp program to exchange the first and last characters in a given string and return the new string. 

​

Sample Input:

"abcd"

"a"

"xy"

Expected Output:

​

dbca

a

yx

*/

using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Introdu un text: ");

        var text = Console.ReadLine();

        Console.WriteLine("Rezultat: {0}",InversareCaractere(text));

    }

    public static string InversareCaractere(string text)

    {

        if(text.Length<=1)

            return text;

        else

            return text[text.Length-1]+text.Substring(1,text.Length-2)+text[0];

    }

}