using System;
using System.Linq;

namespace yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = Int32.Parse(Console.ReadLine());
            var a = Console.ReadLine().Split(' ').Select(s => Int64.Parse(s)).ToArray();

            Int64 sum = 0;
            for (Int32 i = 0; i < n; i++)
            {
                sum += a[i];
            }

            Console.WriteLine(sum);
        }
    }
}