using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using System.Numerics;

class Program {
    static void Main(string[] args) {
        var a = Console.ReadLine().Split().Select(x => int.Parse(x)).ToArray();
        Console.WriteLine(a[0] + a[1] <= a[2] ? "Yes" : "No");
    }
}