Language: C++

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

// #define int long long // intで書いたけど心配なときにlong longに変換する
struct Fast {Fast(){std::cin.tie(0);ios::sync_with_stdio(false);}} fast;

/* short */
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define Fi first
#define Se second
#define ALL(v) begin(v), end(v)
#define RALL(v) rbegin(v), rend(v)
#define X real()
#define Y imag()

/* REPmacro */
#define REPS(i, a, n) for (ll i = (a); i < (ll)(n); ++i)
#define REP(i, n) REPS(i, 0, n)
#define RREP(i, n) REPS(i, 1, n + 1)
#define DEPS(i, a, n) for (ll i = (a); i >= (ll)(n); --i)
#define DEP(i, n) DEPS(i, n, 0)
#define EACH(i, n) for (auto&& i : n)

/* debug */
#define debug(x) cerr << x << " " << "(L:" << __LINE__ << ")" << '\n';

/* alias */
using ll = long long;
using ull = unsigned long long;
using uint = unsigned int;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using pii = pair<int, int>;
using D = double;
using P = complex<D>;
using vs = vector<string>;
template <typename T> using PQ = priority_queue<T>;
template <typename T> using minPQ = priority_queue<T, vector<T>, greater<T>>;

/* const */
const int INF = 1001001001;
const ll LINF = 1001001001001001001ll;
const int MOD = 1e9 + 7;
const D EPS = 1e-9;
const int dx[] = {0, 1, 0, -1, 1, -1, 1, -1}, dy[] = {1, 0, -1, 0, 1, -1, -1, 1};

/* func */
inline bool inside(int y, int x, int H, int W) {return y >= 0 && x >= 0 && y < H && x < W;}
inline int in() {int x; cin >> x; return x;}
inline ll IN() {ll x; cin >> x; return x;}
inline vs split(const string& t, char c) {vs v; stringstream s(t); string b; while(getline(s, b, c)) v.eb(b); return v;}
template <typename T> inline bool chmin(T& a, const T& b) {if (a > b) a = b; return a > b;}
template <typename T> inline bool chmax(T& a, const T& b) {if (a < b) a = b; return a < b;}
template <typename T, typename S> inline void print(const pair<T, S>& p) {cout << p.first << " " << p.second << endl;}
template <typename T> inline void print(const T& x) {cout << x << endl;}
template <typename T, typename S> inline void print(const vector<pair<T, S>>& v) {for (auto&& p : v) print(p);}
template <typename T> inline void print(const vector<T>& v, string s = " ") {REP(i, v.size()) cout << v[i] << (i != (ll)v.size() - 1 ? s : "\n");}
inline void yesno(bool ok, string yes = "Yes", string no = "No") {cout << (ok?yes:no) << endl;}


template <uint MD> struct ModInt {
    using M = ModInt;
    const static M G;
    uint v;
    ModInt(ll _v = 0) { set_v(uint(_v % MD + MD)); }
    M& set_v(uint _v) {
        v = (_v < MD) ? _v : _v - MD;
        return *this;
    }
    explicit operator bool() const { return v != 0; }
    M operator-() const { return M() - *this; }
    M operator+(const M& r) const { return M().set_v(v + r.v); }
    M operator-(const M& r) const { return M().set_v(v + MD - r.v); }
    M operator*(const M& r) const { return M().set_v(uint(ull(v) * r.v % MD)); }
    M operator/(const M& r) const { return *this * r.inv(); }
    M& operator+=(const M& r) { return *this = *this + r; }
    M& operator-=(const M& r) { return *this = *this - r; }
    M& operator*=(const M& r) { return *this = *this * r; }
    M& operator/=(const M& r) { return *this = *this / r; }
    bool operator==(const M& r) const { return v == r.v; }
    M pow(ll n) const {
        M x = *this, r = 1;
        while (n) {
            if (n & 1) r *= x;
            x *= x;
            n >>= 1;
        }
        return r;
    }
    M inv() const { return pow(MD - 2); }
    friend ostream& operator<<(ostream& os, const M& r) { return os << r.v; }
};
using Mint = ModInt<1000000007>;

ll gcd(ll a, ll b) {
    return b != 0 ? gcd(b, a % b) : a;
}

ll a[200001];
ll b[200001];

signed main() {
    //my-code
    ll N; cin >> N;
    REP(i, N) cin >> a[i] >> b[i];
    ll g;
    REP(i, N) {
        g = gcd(abs(a[i]), abs(b[i]));
        a[i] = a[i] / g;
        b[i] = b[i] / g;
        if (a[i] < 0) {
            a[i] = -a[i];
            b[i] = -b[i];
        }
    }

    map<ll, map<ll, ll>> mp;
    REP(i, N) {
        mp[a[i]][b[i]]++;
    }

    ll cntzz = 0;
    ll cntznz = 0;
    ll cntnzz = 0;

    cntzz = mp[0][0];

    Mint ans = (cntzz == N)?N:1;
    if (ans == N) {
        print(N);
        return 0;
    }
    Mint ans = 1;

    map<ll, map<ll, bool>> mpfound;

    ll aa, bb, vv;
    for(auto itr1 = mp.begin(); itr1 != mp.end(); ++itr1) {
        aa = itr1->first;
        for(auto itr2 = mp[aa].begin(); itr2 != mp[aa].end(); ++itr2) {
            bb = itr2->first;
            vv = itr2->second;
            if (aa == 0 && bb == 0) continue;
            if (aa == 0 && bb != 0) cntznz += mp[aa][bb];
            if (aa != 0 && bb == 0) cntnzz += mp[aa][bb];
            if (aa != 0 && bb != 0) {
                if (bb > 0 && mp[bb][-aa] != 0) {
                    if (!mpfound[aa][bb] && !mpfound[bb][-aa]) {
                        Mint v1 = 2;
                        Mint v2 = 2;
                        v1 = v1.pow(mp[aa][bb]) - 1;
                        v2 = v2.pow(mp[bb][-aa]) - 1;
                        ans *= (Mint)(v1 + v2 + Mint(1));
                        // cout << "1-1. ans*=" << v1 + v2 + 1 << endl;
                    }
                } else if (bb < 0 && mp[-bb][aa] != 0) {
                    if (!mpfound[aa][bb] && !mpfound[-bb][aa]) {
                        Mint v1 = 2;
                        Mint v2 = 2;
                        v1 = v1.pow(mp[aa][bb]) - 1;
                        v2 = v2.pow(mp[-bb][aa]) - 1;
                        ans *= (Mint)(v1 + v2 + Mint(1));
                        // cout << "1-2. ans*=" << v1 + v2 + 1 << endl;
                    }
                } else {
                    ans *= (Mint)2;
                    // cout << "2. ans*=" << 2 << endl;
                }
            }
            mpfound[aa][bb] = true;
        }
    }
    Mint v1 = 2;
    Mint v2 = 2;
    v1 = v1.pow(cntznz) - 1;
    v2 = v2.pow(cntnzz) - 1;
    ans *= (Mint)(v1 + v2 + Mint(1));

    ans += (Mint)(cntzz);

    cout << (Mint)(ans-Mint(1)) << endl;

    return 0;
}

// https://github.com/kurokoji/.cpp-Template/wiki テンプレートについて
// http://www.creativ.xyz/dump-cpp-652 dump()について
// https://gist.github.com/rigibun/7905920 色々

Compiler output:
a.cc: In function 'int main()':
a.cc:136:10: error: redeclaration of 'Mint ans'
  136 |     Mint ans = 1;
      |          ^~~
a.cc:131:10: note: 'Mint ans' previously declared here
  131 |     Mint ans = (cntzz == N)?N:1;
      |          ^~~