using System;

namespace abc047A
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            string[] str = Console.ReadLine().Split();
            int a = int.Parse(str[0]);
            int b = int.Parse(str[1]);
            int c = int.Parse(str[2]);
            int d = (a + b + c) / 2;
            if (a == d || b == d || c == d)
                Console.WriteLine("Yes");
            else
                Console.WriteLine("No");
        }
    }
}
