with Ada.Text_IO; use Ada.Text_IO;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;

procedure Solve is
   a : Integer;
   b : Integer;
   c : Integer;
   max : Integer;
begin
   Get (a);
   Get (b);
   Get (c);
   max := a;
   if b > max then
      max := b;
   end if;
   if c > max then
      max := c;
   end if;
   if a+b+c = max*2 then
      Put_Line ("Yes");
   else
      Put_Line ("No");
   end if;
end Solve;