ll.cpp

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*/                              
#include<bits/stdc++.h>
using namespace std;
 
#define fastio ios_base::sync_with_stdio(0); cin.tie(0)
#define LL long long 
#define mod 1000000007 
#define FOR(i, j, k) for (int i=j ; i<k ; i++)
#define ROF(i, j, k) for (int i=j ; i>=k ; i--) 
#define debug(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false); debug("%s time : %.4fs", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))

const long long INF = 1e18;
const long long MAX = 1e5+10;
LL f(LL x, LL y){
    LL res=1;
    while(y){
        if(y&1) res= (res*x)%mod;
        x=(x*x)%mod; y=y>>1;
    }
    return res;
}
int main(){
    fastio;
    int t=1; //cin>>t;
    while(t--){
        LL n;cin>>n; LL ans = 0; int a0=0,b0=0,oo=0;
        set<pair<int,int>>ab,ba;
        FOR(i,0,n){
            LL a,b; cin>>a>>b;
            int g = __gcd(a,b);
            if(a==0 && b) a0++;
            else if(a && b==0) b0++;
            else if(a==0 && b==0) oo++;
            else ab.insert({a/g,b/g}) , ba.insert({b/g,a/g});
        } 
        for(auto i : ab){
            int c=  0;
            
        }
        LL res = ((f(2,n)-1)%mod + mod)%mod;
        
}