using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("kolko chisla iskash da vuvedesh");

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

        Console.WriteLine("vuvedi chislata-");

​

        int sum = 0;

        for ( var i=0; i<n; i++)

        {

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

            sum = sum + num;

        }

        Console.WriteLine("sum= "+ sum);

    }

}