
//Solve A

using System;

public class Main
{
	static void Main()
	{
        string input = Console.ReadLine();
        string[] Sinput = input.Split(' ');
        int coin1 = Convert.ToInt32(Sinput[0]);
        int coin2 = Convert.ToInt32(Sinput[1]);
        int value = Convert.ToInt32(Sinput[2]);
        if (coin1 + coin2 >= value)
        {
            Console.Write("Yes");
        }
        else
        {
            Console.Write("No");
        }
	}
}
