let integerize n fac =
  if n mod fac = 0 then
    if (n / fac) mod fac = 0 then 1
    else fac
  else fac * fac

let rec needs_ls n ls =
  if n > 0 then
    let ai = read_int () in
    needs_ls (n-1) (((integerize ai 2) * (integerize ai 5)) :: ls)
  else List.rev ls

let rec max_item premax = function
    [] -> premax
   |hd :: tl -> max_item (max premax hd) tl

let () =
  let n = read_int () in
  let ans = max_item 1 (needs_ls n []) in
  print_int ans;
  print_endline ""