#include <bits/stdc++.h>
#define FOR(i, a, n) for(ll i = (ll)a; i < (ll)n; i++)
#define FORR(i, n) for(ll i = (ll)n - 1LL; i >= 0LL; i--)
#define rep(i, n) FOR(i, 0, n)
#define ALL(x) begin(x), end(x)
using namespace std;
using ll = long long;
template <typename T> using V = vector<T>;
constexpr int Mod = 998244353;
constexpr int mod = 1e9 + 7;
constexpr ll inf = 1LL << 60;
const double PI = acos(-1);
template <typename T> constexpr bool chmax(T &a, const T &b) {
    if(a >= b) return false;
    a = b;
    return true;
}
template <typename T> constexpr bool chmin(T &a, const T &b) {
    if(a <= b) return false;
    a = b;
    return true;
}

/*-------------------------------------------*/

template <int M> class ModInt {
    int x;

  public:
    constexpr ModInt() : x(0) {}
    constexpr ModInt(int64_t y) : x(y >= 0 ? y % M : (M - (-y) % M) % M) {}
    constexpr ModInt &operator+=(const ModInt p) {
        if((x += p.x) >= M) x -= M;
        return *this;
    }
    constexpr ModInt &operator-=(const ModInt p) {
        if((x += M - p.x) >= M) x -= M;
        return *this;
    }
    constexpr ModInt &operator*=(const ModInt p) {
        x = (int)(1LL * x * p.x % M);
        return *this;
    }
    constexpr ModInt &operator/=(const ModInt p) {
        *this *= p.inverse();
        return *this;
    }
    constexpr ModInt operator-() const { return ModInt(-x); }
    constexpr ModInt operator+(const ModInt p) const {
        return ModInt(*this) += p;
    }
    constexpr ModInt operator-(const ModInt p) const {
        return ModInt(*this) -= p;
    }
    constexpr ModInt operator*(const ModInt p) const {
        return ModInt(*this) *= p;
    }
    constexpr ModInt operator/(const ModInt p) const {
        return ModInt(*this) /= p;
    }
    constexpr bool operator==(const ModInt p) const { return x == p.x; }
    constexpr bool operator!=(const ModInt p) const { return x != p.x; }
    constexpr ModInt inverse() const {
        int a = x, b = M, u = 1, v = 0, t = 0;
        while(b > 0) {
            t = a / b;
            swap(a -= t * b, b);
            swap(u -= t * v, v);
        }
        return ModInt(u);
    }
    constexpr ModInt pow(int64_t k) const {
        ModInt ret(1), mul(x);
        while(k > 0) {
            if(k & 1) ret *= mul;
            mul *= mul;
            k >>= 1;
        }
        return ret;
    }
    constexpr friend ostream &operator<<(ostream &os, const ModInt &p) {
        return os << p.x;
    }
    constexpr friend istream &operator>>(istream &is, ModInt &a) {
        int64_t t = 0;
        is >> t;
        a = ModInt(t);
        return (is);
    }
};
using mint = ModInt<mod>;

int n;
ll a[200009], b[200009];
ll a0, b0;
map<pair<ll, ll>, ll> mp;

pair<ll, ll> inv(pair<ll, ll> p) {
    swap(p.first, p.second);
    (p.first < 0 ? p.first : p.second) *= -1;
    return p;
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    cin >> n;
    rep(i, n) {
        cin >> a[i] >> b[i];
        if(a[i] == 0 && b[i] == 0) continue;
        if(a[i] == 0) {
            a0 += 1;
            continue;
        }
        if(b[i] == 0) {
            b0 += 1;
            continue;
        }
        ll x = gcd(a[i], b[i]);
        a[i] /= x;
        b[i] /= x;
        if(a[i] < 0) {
            a[i] = -a[i];
            b[i] = -b[i];
        }
        mp[make_pair(a[i], b[i])] += 1;
    }

    mint ans = (mint(2).pow(a0) + mint(2).pow(b0) - 1);

    for(auto &[key, val] : mp) {
        mint x = 1;
        if(mp.count(inv(key))) x = mint(2).pow(mp[inv(key)]);
        ans *= (mint(2).pow(val) + x - 1);
        val = 0;
        if(mp.count(inv(key))) mp[inv(key)] = 0;
    }

    cout << ans - 1 << endl;

    return 0;
}