using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Unesi cetvorocifreni broj");

        int a=int.Parse(Console.ReadLine());

        int b=a/1000;

        int c=a/100%10;

        int d=a/10%10;

        int e=a%10;

        Console.WriteLine("Zbir je " +(b*b+c*c+d*d+e*e));

    }

}

​