using System;

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

            for (var i = 0; i != num; ++i) {
                answer += UInt64.Parse( Console.ReadLine()  );
            }

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