let solve a b =
    if a = b then
        a * 2 - 1
    else
        (min a b) * 2

let () =
    let a, b =
        read_line ()
        |> fun l -> Scanf.sscanf l "%d %d" (fun a b -> (a, b)) in
    
    Printf.printf "%d\n" @@ solve a b