open System
let R T = stdin.ReadLine()|> T
let RS T = stdin.ReadLine().Split()|>Array.map T
let R2 T U = RS string|>fun c-> (c.[0]|>T),(c.[1]|>U)
let R3 T U V = RS string|>fun c-> (c.[0]|>T),(c.[1]|>U),(c.[2]|>V)
let R4 T U V W = RS string|>fun c-> (c.[0]|>T),(c.[1]|>U),(c.[2]|>V),(c.[3]|>W)
let R5 T U V W X = RS string|>fun c-> (c.[0]|>T),(c.[1]|>U),(c.[2]|>V),(c.[3]|>W),(c.[4]|>X)
[<EntryPoint>]
let main argv =
    let N,D=R2 int int64
    let _ = RS int
    RS int64
    |>Array.sum
    |>fun c -> ((D+c-1L)/c)
    |>printfn "%d"
    0