using System;

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("Enter the no:");

        int no=int.Parse(Console.ReadLine());

        int r,sum=0;

        while(no>0)

        {

            r=no%10;

            sum=sum+r;

            no=no/10;

        }

        Console.WriteLine("result is:"+sum);

    }

}