using System;
using System.Collections.Generic;
using System.Linq;

public class Yuki9009
{
	public static void Main()
	{
		Console.ReadLine();
		var a = new List<long>();
		string s;
		while((s = Console.ReadLine()) != null) a.Add(long.Parse(s));
		Console.WriteLine(a.Sum());
	}
}