using System;
using System.Linq;

namespace ContestCSharp {
    class Program {
        static void Main(string[] args) {
            Console.ReadLine();
            UInt64 ans=0;

            var inputs = Console.ReadLine().Split( ' ' ).ToList().ConvertAll( UInt64.Parse );
            foreach (var n in inputs){ans+=n;}
            Console.WriteLine( $"{ans.ToString():d}" );
        }
    }
}