#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < n; i++)
#define rep2(i, x, n) for(int i = x; i <= n; i++)
#define rep3(i, x, n) for(int i = x; i >= n; i--)
#define elif else if
#define sp(x) fixed << setprecision(x)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
using ll = long long;
using ld = long double;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
const ll MOD = 1e9+7;
//const ll MOD = 998244353;
const int inf = (1<<30)-1;
const ll INF = (1LL<<60)-1;
const ld EPS = 1e-10;
template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;};
template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;};

ll gcd(ll a, ll b){
    if(b == 0) return a;
    else return gcd(b, a%b);
}

ll lcm(ll a, ll b){
    return a*b/gcd(a,b);
}

//aとbの最大公約数を返し、ax+by=gcd(a,b)を満たすようにx,yを変更する
ll extgcd(ll a, ll b, ll &x, ll &y){
    ll d = a;
    if(b == 0) x = 1, y = 0;
    else{
        d = extgcd(b, a%b, y, x);
        y -= (a/b)*x;
    }
    return d;
}

//mod-int構造体
//計算量 加減乗算:O(1)、除算:O(log(MOD))、K乗:O(log(K))

template<ll mod> struct Mod_Int{
    ll x;
    Mod_Int() {}
    Mod_Int(ll y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod){}

    Mod_Int &operator += (const Mod_Int &p) {
        x = (x + p.x) % mod;
        return *this;
    }

    Mod_Int &operator -= (const Mod_Int &p) {
        x = (x + mod - p.x) % mod;
        return *this;
    }

    Mod_Int &operator *= (const Mod_Int &p) {
        x = (x * p.x) % mod;
        return *this;
    }

    Mod_Int &operator /= (const Mod_Int &p) {
        *this *= p.inverse();
        return *this;
    }

    Mod_Int operator -() const {return Mod_Int(-x);}

    Mod_Int operator + (const Mod_Int &p) const {return Mod_Int(*this) += p;}

    Mod_Int operator - (const Mod_Int &p) const {return Mod_Int(*this) -= p;}

    Mod_Int operator * (const Mod_Int &p) const {return Mod_Int(*this) *= p;}

    Mod_Int operator / (const Mod_Int &p) const {return Mod_Int(*this) /= p;}

    bool operator == (const Mod_Int &p) const {return x == p.x;}

    bool operator != (const Mod_Int &p) const {return x != p.x;}

    Mod_Int pow (ll n) const{
        Mod_Int now = *this, ret = 1;
        while(n > 0){
            if(n & 1) ret *= now;
            now *= now, n >>= 1;
        }
        return ret;
    }

    Mod_Int inverse () const{
        return pow(mod-2);
    }
};

using mint = Mod_Int<MOD>;
const int MAX_N = 1e6;
mint fac[MAX_N+1];

void init(){
    fac[0] = 1;
    rep2(i, 1, MAX_N){
        fac[i] = fac[i-1]*mint(i);
    }
}

mint comb(mint n, mint k){
    return fac[n.x]/(fac[n.x-k.x]*fac[k.x]);
}

mint perm(mint n, mint k){
    return fac[n.x]/fac[n.x-k.x];
}

int main(){
    int N;
    cin >> N;
    map<pll, int> mp;
    int cnt = 0;
    rep(i, N){
        ll A, B;
        cin >> A >> B;
        if(A == 0 && B == 0) {cnt++; continue;}
        ll G;
        G = gcd(abs(A), abs(B));
        A /= G, B /= G;
        if(A < 0) A *= -1, B *= -1;
        if(A == 0 && B == -1) B = 1;
        mp[pll(A, B)]++;
    }
    mint ans = 1, two = 2, one = 1;
    vector<pii> ps;
    for(auto &e: mp){
        if(e.second == 0) continue;
        ll x = e.first.first, y = e.first.second;
        int n;
        ll X, Y;
        if(y > 0) X = y, Y = -x;
        else X = -y, Y = x;
        if(!mp.count(pll(X, Y))) n = 0;
        else{
            n = mp[pll(X, Y)];
            mp[pll(X, Y)] = 0;
        }
        ps.pb(pii(e.second, n));
        e.second = 0;
    }
    for(auto &e: ps){
        int m = e.first, n = e.second;
        ans *= (two.pow(m)+two.pow(n)-one);
    }
    ans -= one;
    ans += (mint)cnt;
    cout << ans.x << endl;
}

Measured memory_bytes: 17784