using System;

public class Program

{

    public static void Main()

    {

        int  n,sum=0,m;         

       Console.Write("Enter a number: ");      

       n= Convert.ToInt32(Console.ReadLine());     

      while(n>0)      

       {      

        m=n%10;      

        sum=sum+m;      

        n=n/10;      

       }      

       Console.Write("Sum is= "+sum);       

    }

}