exception Hoge
let calc x = 
  match x with
  | a::b::c::[] -> a + b = c
  | _ -> raise Hoge

let () =
  Scanf.scanf "%d %d %d\n" (fun a b c -> [a; b; c])
  |> List.sort compare
  |> calc
  |> fun b -> if b then print_endline "Yes"
  else print_endline "No"