using System;

public class Program

{

    public static void Main()

    {

        int[] a = new int[]{4,0,1,-2,3};

        int[] b = new int[a.Length];

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

        {

            b[i] = a[i];

            if(i>0)

            {

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

            }

            if(i<a.Length-1)

            {

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

            }

            Console.WriteLine(b[i]);

        }

    }

}