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

namespace ConsoleApp36 {
    class Program {
        static void Main(string[] args) {
            var st = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

            int A = st[0];
            int B = st[1];
            int C = st[2];

            if (A + B * 2 >= C) {
                Console.WriteLine("Yes");
            } else {
                Console.WriteLine("No");
            }
        }
    }
}
