let [| n; m; k |] =
    stdin.ReadLine().Split()
    |> Array.map uint64
let op, sumB =
    stdin.ReadLine().Split()
    |> fun x ->
        x.[0],
        x.[1..]
        |> Array.map uint64
        |> Array.sum
let arrA = [|
    for i in 0UL .. n - 1UL ->
        stdin.ReadLine()
        |> uint64
|]

let table = [|
    for a in arrA ->
        if op = "+" then
            (a % k) * (m % k) % k
            |> (+) sumB
            |> (%) <| k
        else
            (a % k) * (sumB % k) % k
|]

table
|> Array.sum
|> (%) <| k
|> printfn "%d"