let () = let rec insert lst (i,n) = match lst with | [] -> [(i, n)] | (j,m) :: t -> if i = j then (j, n+m) :: t else (j,m) :: insert t (i,n) in Scanf.scanf "%d\n" @@ fun n -> let arr = Array.to_list (Array.init n @@ fun _ -> Scanf.scanf "%d " @@ fun d -> d) in let brr = Array.to_list (Array.init n @@ fun _ -> Scanf.scanf "%d " @@ fun d -> d) in let rank = List.fold_left2 (fun lst b a -> insert lst (b,a)) [] brr arr in let slst = List.fast_sort (fun (ix,nx) (iy,ny) -> ny-nx) rank in Printf.printf "%s\n" (if fst (List.hd slst) = 0 then "YES" else "NO")