using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ABC091A
{
	class Program
	{
		static void Main(string[] args)
		{
			int a,b, c;
			var word = Console.ReadLine().Split(' ');
			a = int.Parse(word[0]);
			b = int.Parse(word[1]);
			c = int.Parse(word[2]);
			if (a + b <= c)
			{
				Console.WriteLine("No");
			}
			else 
			{
				Console.WriteLine("Yes");
			}
			Console.ReadKey();
		}
	}
}
