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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            Array.Sort(line);
            int a = int.Parse(line[0]);
            int b = int.Parse(line[1]);
            int c = int.Parse(line[2]);

            if (c == b + a)
            {
                Console.WriteLine("Yes");
            }
            else
            {
                Console.WriteLine("No");
            }

        }
    }
}
