Here is the solution , all the best !!

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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

 namespace ClassLibrary1

{

    public class Class1

    {

        public static void Main(string[]
args)

        {

            string s = "((())())";

            Console.WriteLine(s+"
Should return 1:" + nesting(s));

 

            string s1 = "(())())";

            Console.WriteLine(s1 + "
Should return 0:" + nesting(s1));

 

            string s2 = string.Empty;

            Console.WriteLine(s2 + "
Should return 1:" + nesting(s2));

           

            string s3 = "s(sddsfs(sdasdf)()()
))";

            Console.WriteLine(s3 + "
Should return 0:" + nesting(s3));

            Console.WriteLine("Test
Number o jump ");

            int[] arr  =
{2,3,1,1,3};

           int[] arrNeverEnds = { 2, 3, 1, -1, 2, 3 };

            Console.WriteLine("Number
of jump for {2,3,1,1,3} :" + arrayJmp(arr));

            Console.WriteLine("Jump
never ends { 2, 3, 1, -1, 2, 3 } :" + arrayJmp(arrNeverEnds));

            Console.ReadLine();

       }

 

       public static  int arrayJmp(int[] A)

        {

            if (A.Length == 0)

            {

               
throw new  ArgumentException("empty array");

            }

 

            int numberOfJump = 0;

            int nextJumpIndex 
=0 ;

 

            for (int i =0; i <
A.Length ; i ++)

            {

               
nextJumpIndex = nextJumpIndex+A[nextJumpIndex];

               
numberOfJump++;

               
if (nextJumpIndex > A.Length)

               
{

                    return
numberOfJump;

               
}

 

            }

 

            return -1;

        }

        public static int nesting(string s)

        {

            if (string.IsNullOrEmpty(s))

            {

               
return 1;

          

            }

             char[] arrS = s.ToCharArray();

            Stack<char>
stack = new Stack<char>();

             foreach (char c in arrS)

            {

               
if (c == '(')

               
{

                   
stack.Push(c);

                }

 

               
if (c == ')')

               
{

                   
if (stack.Count > 0)

                   
{

                        stack.Pop();

                   
}

                   
else

                   
{

                        return 0;

 

                   
}

               
}

 

               

            }

 

            if (stack.Count > 0)

            {

               
return 0;

            }

            else

            {

               
return 1;

            }

        }

 

    }

}