let () =
    let a, b, c = stdin.ReadLine () |>
                  (fun str -> str.Split()) |>
                  Array.map int |>
                  fun arr -> (arr.[0], arr.[1], arr.[2])
    (a = b + c || b = a + c || c = a + b) |>
    (function | true -> "Yes" | false -> "No") |>
    printfn "%s"