#line 2 "header.hpp"

//%snippet.set('header')%
//%snippet.fold()%
#ifndef HEADER_H
#define HEADER_H

// template version 2.0
using namespace std;
#include <bits/stdc++.h>

// varibable settings
const long long INF = 1e18;
template <class T> constexpr T inf = numeric_limits<T>::max() / 2.1;

#define _overload3(_1, _2, _3, name, ...) name
#define _rep(i, n) repi(i, 0, n)
#define repi(i, a, b) for (ll i = (ll)(a); i < (ll)(b); ++i)
#define rep(...) _overload3(__VA_ARGS__, repi, _rep, )(__VA_ARGS__)
#define _rrep(i, n) rrepi(i, 0, n)
#define rrepi(i, a, b) for (ll i = (ll)((b)-1); i >= (ll)(a); --i)
#define r_rep(...) _overload3(__VA_ARGS__, rrepi, _rrep, )(__VA_ARGS__)
#define each(i, a) for (auto &&i : a)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define pb(a) push_back(a)
#define mp(a, b) make_pair(a, b)
#define mt(...) make_tuple(__VA_ARGS__)
#define ub upper_bound
#define lb lower_bound
#define lpos(A, x) (lower_bound(all(A), x) - A.begin())
#define upos(A, x) (upper_bound(all(A), x) - A.begin())
template <class T> inline void chmax(T &a, const T &b) { if ((a) < (b)) (a) = (b); }
template <class T> inline void chmin(T &a, const T &b) { if ((a) > (b)) (a) = (b); }
template <typename X, typename T> auto make_table(X x, T a) { return vector<T>(x, a); }
template <typename X, typename Y, typename Z, typename... Zs> auto make_table(X x, Y y, Z z, Zs... zs) { auto cont = make_table(y, z, zs...); return vector<decltype(cont)>(x, cont); }

#define divceil(a, b) ((a) + (b)-1) / (b)
#define is_in(x, a, b) ((a) <= (x) && (x) < (b))
#define uni(x) sort(all(x)); x.erase(unique(all(x)), x.end())
#define slice(l, r) substr(l, r - l)

typedef long long ll;
typedef long double ld;

template <typename T>
using PQ = priority_queue<T, vector<T>, greater<T>>;
struct Fast { Fast() { std::cin.tie(0); ios::sync_with_stdio(false); } } fast;
void check_input() { assert(cin.eof() == 0); int tmp; cin >> tmp; assert(cin.eof() == 1); }

#if defined(PCM) || defined(LOCAL)
#else
#define dump(...) ;
#define dump_1d(...) ;
#define dump_2d(...) ;
#define cerrendl ;
#endif

#endif /* HEADER_H */
//%snippet.end()%
#line 2 "solve.cpp"
template<class T=ll> using vec = vector<T>;

ll mod = 1e9 + 7;
struct mll {  //{{{
    ll x;
    mll(ll x = 0) : x((x % mod + mod) % mod) {}

    // ?= operator
    mll& operator+=(const mll a) {
        (x += a.x) %= mod;
        return *this;
    }
    mll& operator-=(const mll a) {
        (x += mod - a.x) %= mod;
        return *this;
    }
    mll& operator*=(const mll a) {
        (x *= a.x) %= mod;
        return *this;
    }
    mll& operator/=(const mll& rhs) {
        if (rhs.x == 0) throw runtime_error("mll zero division");
        return *this *= rhs.inv();
    }

    mll operator+(const mll a) const {
        mll res(*this);
        return res += a;
    }
    mll operator-(const mll a) const {
        mll res(*this);
        return res -= a;
    }
    mll operator*(const mll a) const {
        mll res(*this);
        return res *= a;
    }
    mll operator/(const mll a) const {
        mll res(*this);
        return res /= a;
    }

    mll pow(ll n) const {
        mll res(1), x(*this);
        if (n < 0) {
            n = -n;
            x = (*this).inv();
        }
        while (n) {
            if (n & 1) res *= x;
            x *= x;
            n >>= 1;
        }
        return res;
    }

    mll inv() const {
        if (x == 0) throw runtime_error("inv does not exist");
        return pow(mod - 2);
    }
    // mll inv()const{
    //     ll x,y;
    //     ll g=extgcd(v,mod,x,y);
    //     assert(g==1);
    //     if(x<0)x+=mod;
    //     return mll(x);
    // }

    bool operator<(const mll& r) const { return x < r.x; }
    bool operator==(const mll& r) const { return x == r.x; }
};
istream& operator>>(istream& is, const mll& a) { return is >> a.x; }
ostream& operator<<(ostream& os, const mll& a) { return os << a.x; }
//}}}
struct combination {  // {{{
    vector<mll> fact, ifact;
    combination(ll n) : fact(n + 1), ifact(n + 1) {
        assert(n < mod);
        fact[0] = 1;
        for (ll i = 1; i <= n; ++i) fact[i] = fact[i - 1] * i;
        ifact[n] = fact[n].inv();
        for (ll i = n; i >= 1; --i) ifact[i - 1] = ifact[i] * i;
    }
    mll operator()(ll n, ll k) {
        if (k < 0 || k > n) return 0;
        return fact[n] * ifact[k] * ifact[n - k];
    }
}  // }}}
com(500001);

template<class T=ll>/*{{{*/
struct P2 {
    T x, y;
    P2(T _x, T _y) : x(_x), y(_y) {}
    P2() {
        x = 0;
        y = 0;
    }
    bool operator<(const P2 &r) const {
        return (x != r.x ? x < r.x : y < r.y);
    }
    bool operator>(const P2 &r) const {
        return (x != r.x ? x > r.x : y > r.y);
    }
    bool operator==(const P2 &r) const { return (x == r.x && y == r.y); }

    friend ostream &operator<<(ostream &stream, P2 p) {
        stream << "(" << p.x << "," << p.y << ")";
        return stream;
    }

    P2 operator-() const {  // 単項演算子
        return P2(-x, -y);
    }

    P2& operator+=(const P2& r){
        x += r.x;
        y += r.y;
        return *this;
    }
    P2& operator-=(const P2& r){
        x -= r.x;
        y -= r.y;
        return *this;
    }

    P2 operator+(const P2& r) const {
        P2 res(*this);
        return res += r;
    }
    P2 operator-(const P2& r) const {
        P2 res(*this);
        return res -= r;
    }

    template<class U=ll>
    P2 operator*(U v) const {
        P2 res(*this);
        res.x *= v;
        res.y *= v;
        return res;
    }
    template<class U=ll>
    P2 operator/(U v) const {
        P2 res(*this);
        res.x /= v;
        res.y /= v;
        return res;
    }

    bool in(T a, T b, T c, T d) {  // x in [a, b) && y in [c, d)
        if (a <= x && x < b && c <= y && y < d)
            return true;
        else
            return false;
    }

};/*}}}*/

template<class T=ll> 
struct rational : public P2<T> {
    rational(){}
    rational(T _x, T _y) : P2<T>(_x, _y) {
        T g = gcd(this->x, this->y);
        this->x /= g; this->y /= g;
        if (this->y<0 or (this->y==0 && this->x==-1)) this->x *= -1, this->y *= -1;
    }
};

using R = rational<ll>;
map<R, ll> cnt;
ll solve() {
    ll n;cin>>n;
    assert(rational(3, 5) == rational(-3, -5));
    assert(rational(3, 5) == rational(-6, -10));
    
    mll zz = 0;
    rep(i, n){
        ll a,b;cin>>a>>b;
        if (a==0 && b==0){ zz += 1; }
        else{ cnt[rational(a, b)]++; }
    }
    dump(zz);

    mll ans = 1;
    map<R, int> used;
    each(el, cnt){
        cerrendl;
        auto [key, c] = el;
        used[key] = 1;
        auto [p, q] = key;
        if (auto r = rational(-q, p); cnt.find(r) != cnt.end()){
            if (used[r]) continue;
            used[r] = 1;
            mll x = mll(2).pow(c) - 1;
            mll y = mll(2).pow(cnt[r]) - 1;
            ans *= x + y + 1;
        }
        else{
            ans *= mll(2).pow(c);
        }
        dump(ans);
    }
    cout << (ans+zz-1) << endl;

    return 0; 
}


int main(){/*{{{*/
    solve();
    check_input();
    return 0;
}/*}}}*/


Measured memory_bytes: 35876