using System;

class Program
{
	static void Main ()
	{
		int n = int.Parse (Console.ReadLine ());
		
		string[] nums_str = Console.ReadLine ().Split (' ');
		ulong ans = 0;
		for (int i = 0; i < n; i++)
		{
			ans += ulong.Parse (nums_str[i]);
		}

		Console.WriteLine (ans);
	}
}