let f xs = 
    let size = Array.length
    let isOdd x = x % 2 <> 0
    let odds = xs |> Array.where(isOdd)
    let origN = xs   |> size
    let oddsN = odds |> size
    let evesN = origN - oddsN
    abs(oddsN - evesN)

let R() = stdin.ReadLine()

let N = R() |> int
let X = R().Split() |> Array.map int

f X |> stdout.WriteLine