using System;
using System.Linq;
using System.Collections.Generic;
class Program
{
    static void Main(string[] args)
    {
      string[] input = Console.ReadLine().Split();
      int a = int.Parse(input[0]);
      int b = int.Parse(input[1]);
      int c = int.Parse(input[2]);
      
      if ((a+b)>c)
      {
        Console.WriteLine("Yes");
      }
      else
      {
        Console.WriteLine("No");
      }
    }
}
