using System;
using System.Linq;

public class Test
{
	public static void Main()
	{
		string[] str = Console.ReadLine().Split(' ');
		int a,b,c;
		a = int.Parse(str[0]);
        b = int.Parse(str[1]);
        c = int.Parse(str[2]);
        if(a == b+c || b = a+c || c == a+b){
			Console.WriteLine("YES");
        }else{
        	Console.WriteLine("NO");
        }
	}
}