#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int MD = 1e9 + 7;
map<pair<ll, ll>, ll> ma;
ll quick_pow(ll a, ll b) {
    ll res=1;
    for(;b;b>>=1){
        if(b&1) res=res*a%MD;
        a=a*a%MD;
    }
    return res;
}
int main() {
    int n, s = 0;
    scanf("%d", &n);
    for(int i = 0; i < n; i++) {
        ll a, b;
        scanf("%lld%lld", &a, &b);
        ll d = __gcd(a, b);
        if(d == 0) {
            s++;
            continue;
        }
        a /= d, b /= d;
        if(a < 0) a = -a, b = -b;
        ma[{a, b}]++;
    }
    ll ans = 1;
    for(auto it : ma) {
        if(it.second == 0) continue;
        ll a = it.first.first, b = it.first.second;
        ll d = quick_pow(2, ma[{a, b}]);
        b = -b;
        if(b < 0) a = -a, b = -b;
        if(ma.count({b, a})) {
            d = (d + quick_pow(2, ma[{b, a}]) - 1) % MD;
            ma[{b, a}] = 0;
        }
        printf("d:%lld\n\n",d);
        ans = ans * d % MD;
    }
    ans = (ans - 1 + s + MD) % MD;
    printf("%lld\n", ans);
    return 0;
}