open Batteries
module EnumL = Enum.Labels
module ListL = List.Labels
module ArrayL = Array.Labels

let dbg0 x = Printf.eprintf "[debug]%s\n" @@ dump x
let dbg1 x = dbg0 x; x

let prime = 1_000_000_007

let id = identity

let (++) n m = List.range n `To m
let (++-) n m = if n >= m then List.range n `Downto m else []
let (++^) n m = if n < m then List.range n `To (pred m) else []

let scan fmt = Scanf.sscanf (read_line ()) fmt

let scan_lines n fmt f =
  if n = 0 then []
  else List.map (fun _ -> scan fmt f) (1 ++ n)

let scan_list ?sep cnv =
  let line = read_line () in
  (match sep with
   | None -> List.map String.of_char @@ String.to_list line
   | Some sep -> String.split_on_char sep line)
  |> List.map cnv

let scan_array ?sep cnv = Array.of_list @@ scan_list ?sep cnv

let scan_matrix n m e ?sep conv =
  let arr = Array.make_matrix n m e in
  ListL.iter (0 ++^ n)
    ~f:(fun i -> arr.(i) <- Array.of_list @@ scan_list ?sep conv);
  arr

let atoi c = Char.code c - Char.code '0'

let rec powerset = function
  | [] -> [[]]
  | hd::tl ->
    let pws =  powerset tl in
    pws @ ListL.map pws ~f:(fun pw -> hd::pw)

let permutations l =
  let rec interleave x = function
    | [] -> [[x]]
    | (hd::tl) as l ->
      (x::l) :: (interleave x tl |> ListL.map ~f:(fun l -> hd::l)) in
  let rec aux = function
    | [] -> [[]]
    | a::rest ->
      aux rest |> ListL.map ~f:(interleave a) |> List.concat in
  aux l

let intersection l =
  EnumL.filter ~f:(fun x -> EnumL.exists ~f:((=) x) @@ Enum.clone l)

let zip l m =
  let n = min (List.length l) (List.length m) in
  List.combine (List.take n l) (List.take n m)

let lower_bound n f =
  let rec aux l u =
    if u - l > 1 then
      let m = (l + u) / 2 in
      if f m then aux l m
      else aux m u
    else u in aux (-1) n

let between n x m = n <= x && x < m

let n = scan "%d" id
let ls = scan_lines n "%d %d" Tuple2.make

let rec gcd a b =
  if b = 0 then a
  else gcd b (a mod b)

let (+) a b = (a + b) mod prime
let (-) a b = (a + prime - b) mod prime
let ( * ) a b = (a * b) mod prime

let rec pow x n =
  if n = 0 then 1
  else
  if n mod 2 = 0 then  pow (x*x) (n/2)
  else x * pow (x*x) (n/2)

let () =
  let h = Hashtbl.create n in
  let (ks, ms) = ListL.partition ls ~f:(fun (a,b) -> a = 0 && b = 0) in
  let ms = ListL.map ms ~f:(fun (a, b) ->
      let m = gcd (abs a) (abs b) in (a/m, b/m)) in
  ListL.iter ms ~f:(fun v -> Hashtbl.modify_def 0 v succ h);
  Hashtbl.map (fun (a,b) n ->
      let x = Hashtbl.find_default h (-b,a) 0 in
      let y = Hashtbl.find_default h (b,-a) 0 in
      Hashtbl.remove h (-b,a); Hashtbl.remove h (b,-a);
      (pow 2 n - 1) + (pow 2 x - 1) + (pow 2 y - 1) + 1) h
  |> Hashtbl.to_list |> List.map  Tuple2.second
  |> ListL.fold_left ~init:1 ~f:( * )
  |> ((+) (List.length ks - 1))
  |> Printf.printf "%d\n"
