using System;
//using System.Linq;

namespace ContestCSharp {
    class Program {
        static void Main(string[] args) {
            UInt64 answer = 0;
            var num = int.Parse( Console.ReadLine() );

            //var inputs = Console.ReadLine().Split( ' ' ).ToList().ConvertAll( UInt64.Parse );
            //foreach (var n in inputs) { answer += n; }
            string[] inputs = Console.ReadLine().Split( ' ' );
            for (var i = 0; i != num; ++i) {
                answer +=UInt64.Parse( inputs[ i ]);

            }

            Console.WriteLine( $"{answer.ToString():d}" );
        }
    }
}