using System;

namespace AtcoderABC047A
{
    class Program
    {
        static void Main(string[] args)
        {
            int a, b, c;
            var word = Console.ReadLine().Split();
            a = int.Parse(word[0]);
            b = int.Parse(word[1]);
            c = int.Parse(word[2]);
            if (a + b == c || a == b + c || b == a + c)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }
            Console.ReadKey();
        }
    }
}
