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

namespace ConsoleApp44 {
    class Program {
        static void Main(string[] args) {
            var s = Console.ReadLine().Split(',').Select(int.Parse).ToArray();
            Array.Sort(s);


            if (s[0] + s[1] == s[2]) {
                Console.WriteLine("Yes");
            } else {
                Console.WriteLine("No");
            }
        }
    }
}
