Scanf.scanf "%d %d" (fun n d ->
    let a = Array.init n (fun i ->
        if i = 0 then 0 else Scanf.scanf " %d" (fun a -> a))
    in
    let b = Array.make n 0 in
    for i = 1 to n - 1 do
        a.(i) <- a.(i) + a.(i - 1);
        b.(i) <- max a.(i) (b.(i - 1) + d)
    done;
    Printf.printf "0";
    for i = 1 to n - 1 do
        Printf.printf " %d" b.(i)
    done;
    print_newline ()
)