using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SumaNumeros
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = 0;
            int suma = 0;
            do {
                suma = 0;
                Console.Write("Dame un numero: ");
                num = Int32.Parse(Console.ReadLine());
                for (int i = 1; i <= num; i++) {
                    suma += i;
                }
                Console.WriteLine(num+ " : "+suma);
            } while (num != 0);
            Console.WriteLine("Adeu Andreu");
            Console.ReadLine();
        }
    }
}