using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("ใส่ค่า 4 ตัว");

        int n1 = int.Parse(Console.ReadLine());

        int n2 = int.Parse(Console.ReadLine());

        int n3 = int.Parse(Console.ReadLine());

        int n4 = int.Parse(Console.ReadLine());

        if(n1+n2==0)

            Console.WriteLine("Yes");

        else if(n1+n3==0)

            Console.WriteLine("Yes");

        else if(n1+n4==0)

            Console.WriteLine("Yes");

        else if(n2+n3==0)

            Console.WriteLine("Yes");

        else if(n2+n4==0)

            Console.WriteLine("Yes");

        else if(n3+n4==0)

            Console.WriteLine("Yes");

        else

            Console.WriteLine("No");

    }

}