#include <iostream>
#include <algorithm>
#include <utility>
#include <string>
#include <vector>
#include <set>
#include <stack>
#include <queue>
#include <map>
#include <math.h>
#include <string.h>
#include <iomanip>
#include <numeric>
#include <cstdlib>
#include <cstdint>
#include <cmath>
#include <functional>
#include <limits>
#include <cassert>
#include <bitset>

using namespace std;

/* template */

using ll = long long;

void debug_out() { std::cout << std::endl; }
 
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cout << H << " ";
  debug_out(T...);
}

#ifdef LOCAL
#define debug(...) cout << "debug: "; debug_out(__VA_ARGS__)
#else
#define debug(...) 
#endif

#define rep(i, a, n) for (int i = (int)(a); i < (int)(n); i++)
#define rrep(i, a, n) for (int i = ((int)(n-1)); i >= (int)(a); i--)
#define Rep(i, a, n) for (long long i = (long long)(a); i< (long long)(n); i++)
#define RRep(i, a, n) for (long long i = ((long long)(n-1ll)); i>=(long long)(a); i--)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()

template <typename T>
std::ostream& operator<<(std::ostream& os, std::vector<T> vec) {
  for (std::size_t i = 0; i < vec.size(); i++)os << vec[i] << (i + 1 == vec.size() ? "" : " ");
  return os;
}

struct Edge{
    int to;
    ll weight;
    Edge(int t, ll w) : to(t), weight(w){ }
};

struct edge{
    int from;
    int to;
    ll weight;
    edge(int f,int t,ll w) : from(f), to(t), weight(w){ }
};


using Graph = vector<vector<Edge>>;
using graph = vector<vector<int>>;
using edges = vector<edge>;

template <class T>
inline bool chmin(T &a, T b){
    if (a > b){
        a = b;
        return true;
    }
    return false;
}

template <class T>
inline bool chmax(T &a, T b){
    if (a < b){
        a = b;
        return true;
    }
    return false;
}

template <class T>
T lcm(T a, T b){
    return (a*b)/gcd(a,b);
}

constexpr ll LNF = 1LL<<60;

constexpr int INF = 1e9+7;

const double PI=3.14159265358979323846;


vector<int> dx = {-1,0,1,0,-1,1,-1,1};
vector<int> dy = {0,-1,0,1,1,-1,-1,1};

/* template */

constexpr ll mod = 1000000007;
struct mint {
  ll x; // typedef long long ll;
  mint(ll x=0):x((x%mod+mod)%mod){}
  mint operator-() const { return mint(-x);}
  mint& operator+=(const mint a) {
    if ((x += a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator-=(const mint a) {
    if ((x += mod-a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator*=(const mint a) { (x *= a.x) %= mod; return *this;}
  mint operator+(const mint a) const { return mint(*this) += a;}
  mint operator-(const mint a) const { return mint(*this) -= a;}
  mint operator*(const mint a) const { return mint(*this) *= a;}
  mint pow(ll t) const {
    if (!t) return 1;
    mint a = pow(t>>1);
    a *= a;
    if (t&1) a *= *this;
    return a;
  }

  // for prime mod
  mint inv() const { return pow(mod-2);}
  mint& operator/=(const mint a) { return *this *= a.inv();}
  mint operator/(const mint a) const { return mint(*this) /= a;}
};
istream& operator>>(istream& is, const mint& a) { return is >> a.x;}
ostream& operator<<(ostream& os, const mint& a) { return os << a.x;}

ll mod_pow(ll x, ll n, ll mod){
    ll res = 1;
    while(n>0){
        if(n&1) res = res *x%mod;
        x = x*x%mod;
        n>>=1;
    }
    return res;
}

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    ll n; cin >> n;
    map<pair<ll,ll>,ll> m;
    vector<ll> a(n);
    vector<ll> b(n);
    ll zero = 0;
    rep(i,0,n){
        cin >> a[i] >> b[i];
        if(a[i]==0 && b[i]==0){
            zero++;
            continue;
        }
        ll flag = 1ll;
        if((a[i]<0 && b[i]>0) || (a[i]>0 && b[i]<0)){
            flag = -1ll;
        }
        a[i] = abs(a[i]);
        b[i] = abs(b[i]);
        if(a[i]==0){
            m[{0,-1}]++;
        } else if(b[i]==0){
            m[{1,0}]++;
        }
        else{
            ll p = __gcd(a[i],b[i]);
            a[i] /=p;
            b[i] /=p;
            m[{flag*a[i],b[i]}]++;
        }
        b[i] = flag*b[i];
    }
    mint ans = 1ll;
    for(auto &x: m){
        auto p = x.first;
        if(p.first<0){
            p.second = -p.second;
            p.first = -p.first;
        }
        auto q = m.find({-p.second,p.first});
        debug(x.second);
        if(q==m.end()){
            ans *= mod_pow(2ll,x.second,mod);
            continue;
        }
        ans *= (mod_pow(2ll,x.second,mod)+mod_pow(2ll,q->second,mod)-1);
        debug(100,q->second);
        m.erase(q);
    }
    ans += zero-1;
    cout << ans << endl;
} 

Measured memory_bytes: 18760