using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        //Console.WriteLine("Hello World");

        string s="SiddhuSiddharthRoy";

        int [] a ={1,3,4,5,3,1,5,3,1,7,8};

        //findUnique(a);

        //Using LINQ

        //callLinqMethod(a); // find Unique items

        reverseString(s);

    }

    public static void reverseString(string s){

     char [] arr=s.ToCharArray();

    for(int i=0,j=s.Length-1;i<j;i++,j--){

         arr[i]=s[j];

        arr[j]=s[i];

    }

        Console.WriteLine("Reverse String",arr);

    }

    public static void callLinqMethod(int [] a){

      var items=a.Distinct();

        Console.WriteLine("callLinqMethod:: Unique Items");

        foreach(var i in items){

                Console.WriteLine(i);

​

        }

        //Console.WriteLine("UniqueItems: => "+ string.Join(",",items));

    }

    public static void findUnique(int [] a){

        int n =a.Length;

        for(int i =0;i<n;i++){

            bool isunique=false;

            for(int j=0; j<i ;j++){

                if(a[i]==a[j]){

                    isunique=true;

                }

            }

            if(!isunique){

             Console.WriteLine(a[i]);

            }

        }

    }

}