using System;
using System.Collections.Generic;
using System.Linq;
using static System.Console;

class Program
{
    static void Main()
    {
        var NMX = ReadLine().Split().Select(int.Parse).ToArray();
        WriteLine(NMX[2] - NMX[0] + NMX[1] > 2 ? "YES" : "NO");
    }
}