using System;

public class Program

{

    public static void Main()

    {

        const int n = 15;

            int[] a = new int[n] { 2,-3,6,-7,9,10,13,5,3,-2,9,15,-7,8,-1 };

            Console.Write("{ ");

            for (int i = 0; i < n; i++) Console.Write(a[i] + " ");

            Console.WriteLine("}");

            int maxa = a[0];

            for (int i = 0; i < n; i=i+2)

            {

                if (a[i] > maxa)

                {

                    maxa = a[i];

                }

            }

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

            {

                if (a[i] == maxa)

                {

                    a[i] = i;

                }

            }

            Console.Write("The new array: {");

            for (int i = 0; i < n; i++) Console.Write(a[i] + " ");

            Console.WriteLine("}");

​

    }

}