let N = stdin.ReadLine().Trim() |> int64
let XS = stdin.ReadLine().Split(' ') |> Array.map int64

let odds = Array.fold (fun acc n -> if n % 2L <> 0L then acc + 1L else acc) 0L XS
let evens = (XS.Length |> int64) - odds

printfn "%d" <| abs (odds - evens)