let [| x; y |] =
    stdin.ReadLine().Split()
    |> Array.map int

let isZero = x = 0 && y = 0
let isTateYoko = x * y = 0
let isNaname = abs x = abs y

if isZero then 0
elif isTateYoko || isNaname then 1
else 2
|> printfn "%d"