Language: C++

// Marcin Knapik
#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

using namespace std;

// #include <ext/pb_ds/assoc_container.hpp> // order_of_key
// #include <ext/pb_ds/tree_policy.hpp> // find by order
// using namespace __gnu_pbds; 
// #define ordered_set tree< int , null_type,less< int >, rb_tree_tag,tree_order_statistics_node_update>  

// const ll MAX_LL = 0xFFFFFFFFFFFFFFFF;
// mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define losuj(a, b) uniform_int_distribution<ull>(a, b)(rng)

typedef long double             ld;
typedef long long               ll;
typedef pair<ll, ll>          ii;
typedef vector<int>             vi;
typedef vector<ll>              vll;
typedef vector<vll>             vvll;
typedef vector<ii>              vii;
typedef vector<vi>              vvi;
typedef vector<vii>             vvii;
#define pll pair<long long, long long>

#define sz(a)                   (int)(a).size()
#define pb                      push_back
#define all(c)                  (c).begin(), (c).end()
#define rall(c)                 (c).rbegin(), (c).rend()
#define FOR(i, a)               for (int i = 0; i < (a); i++)
#define f                       first
#define s                       second

template <class T> inline bool setmin(T &a, T b){if (a > b)return a = b, 1;return 0;}
template <class T> inline bool setmax(T &a, T b){if (a < b)return a = b, 1;return 0;}

template<class T> inline T fast(T a,T b,T mod) {ll res = 1; while(b){if(b&1) res = (res*a)%mod;a = (a*a)%mod;b >>= 1;}return res;}
template<class T> istream &operator>>(istream &os, vector<T> &container){for (auto &u : container)os >> u;return os;}
template<class T> ostream &operator<<(ostream &os, const vector<T> &container){for (auto &u : container)os << u << " ";return os;}
template<class T> ostream &operator<<(ostream &os, const pair<T, T> &u){os << u.f << " " << u.s << ' '; return os;}
template<class T> inline T gcd(T a, T b) { while (b)swap(a %= b, b); return a; }

const ll INF = 1e9 + 7;
const ll mod = 998244353;
const ll BIG_INF = 1e18;
const ll N = 1e6+7;
const ll T = 1<<20;
const ld inf = 1e18;

ll n, m, q;

map<pair<ll, ll>, ll > mapa;

pll norm(pll x){
	ll a = x.f, b = x.s;
	if(a == 0 or b == 0)
		return {a, b};
	if(a < 0 and b < 0){
		a *= -1;
		b *= -1;
	}
	ll GCD = (gcd(abs(a), abs(b)));
	a /= GCD;
	b /= GCD;
	if(a < 0){
		a *= -1;
		b *= -1;
	}
	return {a, b};
}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n;
    FOR(i, n){
    	ll a, b;
    	cin >> a >> b;
    	
    	mapa[norm({a, b})]++;
    }
    ll pref = 1;
    // for(auto & u : mapa){
    // 	cout << u.f << "    " << u.s << endl;
    // }
    // cout << endl;
    ll dwa_zera = 0;
    ll pierwsze_zero = 0;
    ll drugie_zero = 0; 
    for(auto & u : mapa){
    	if(u.f.f == 0 and u.f.s == 0){
    		dwa_zera u.s;
    		continue;
    	}
    	else if(u.f.f == 0){
    		pierwsze_zero += u.s;
    		continue;
    	}
    	else if(u.f.s == 0){
    		drugie_zero += u.s;
    		continue;
    	}
    	pll opposite = norm({-u.f.s, u.f.f});
    	// cout << u.f << ' ' << opposite << "     " << u.s << ' ' << mapa[opposite] << endl;
    	if(opposite < u.f){
    		ll pom = pref * fast(fast(2LL, mapa[opposite], INF), INF-2, INF) % INF;
    		// cout << "pom " << pom << endl;
    		pref = pom * (fast(2LL, mapa[opposite], INF) + fast(2LL, u.s, INF) - 1 + INF)% INF;
    	}
    	else
    		pref = pref * fast(2LL, u.s, INF) % INF;
    	// cout << "PREF " << pref << endl;
    }
    // cout << pref << ' ' << drugie_zero << endl;
    pref = pref * (fast(2LL, pierwsze_zero, INF) + fast(2LL, drugie_zero, INF) - 1 + INF)% INF;
    pref += dwa_zera;
    cout << (pref - 1 + INF) % INF << '\n';
}   	

Compiler output:
a.cc: In function 'int main()':
a.cc:96:25: error: expected ';' before 'u'
   96 |                 dwa_zera u.s;
      |                         ^~
      |                         ;