Language: C++

#include <cassert>
#include <cstdio>
#include <cmath>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <numeric>
#include <algorithm>

using namespace std;
using lint = long long;
constexpr int MOD = 1000000007, INF = 1010101010;
constexpr lint LINF = 1LL << 60;

#ifdef _DEBUG
#include "../../../library/library/debug_template.cpp"
#define DMP(...) dump(#__VA_ARGS__, __VA_ARGS__)
#else 
#define DMP(...) ((void)0)
#endif

struct init {
	init() {
		cin.tie(nullptr); ios::sync_with_stdio(false);
		cout << fixed << setprecision(10);
	}
} init_;

template<int Modulo = MOD>
struct Mint {

	lint val;
	constexpr Mint(lint v = 0) noexcept : val(v % Modulo) { if (val < 0) val += Modulo; }

	constexpr Mint& operator += (const Mint &r) noexcept {
		val += r.val;
		if (val >= Modulo) val -= Modulo;
		return *this;
	}
	constexpr Mint& operator -= (const Mint &r) noexcept {
		val -= r.val;
		if (val < 0) val += Modulo;
		return *this;
	}
	constexpr Mint& operator *= (const Mint &r) noexcept {
		val = val * r.val % Modulo;
		return *this;
	}
	constexpr Mint& operator /= (const Mint &r) noexcept {
		lint a = r.val, b = Modulo, u = 1, v = 0;
		while (b) {
			lint t = a / b;
			a -= t * b; swap(a, b);
			u -= t * v; swap(u, v);
		}
		val = val * u % Modulo;
		if (val < 0) val += Modulo;
		return *this;
	}

	constexpr Mint operator + (const Mint &r) const noexcept { return Mint(*this) += r; }
	constexpr Mint operator - (const Mint &r) const noexcept { return Mint(*this) -= r; }
	constexpr Mint operator * (const Mint &r) const noexcept { return Mint(*this) *= r; }
	constexpr Mint operator / (const Mint &r) const noexcept { return Mint(*this) /= r; }

	constexpr int getmod() { return Modulo; }
	constexpr Mint operator - () const noexcept { return val ? Modulo - val : 0; }

	constexpr bool operator == (const Mint &r) const noexcept { return val == r.val; }
	constexpr bool operator != (const Mint &r) const noexcept { return val != r.val; }

	friend ostream &operator << (ostream &os, const Mint<Modulo> &x) noexcept { return os << x.val; }
	friend istream &operator >> (istream &is, Mint<Modulo> &x) noexcept {
		lint tmp; is >> tmp;
		x = Mint(tmp);
		return is;
	}

	constexpr Mint pow(lint n) noexcept {
		Mint res{ 1 }, tmp{ val };
		while (n > 0) {
			if (n & 1) res *= tmp;
			tmp *= tmp;
			n >>= 1;
		}
		return res;
	}
};

using mint = Mint<>;

struct pnt {
	lint x, y;
	constexpr pnt(lint x = 0, lint y = 0) noexcept : x(x), y(y) {};
	constexpr bool operator==(const pnt &rhs) const noexcept { return x == rhs.x && y == rhs.y; }
	constexpr bool operator<(const pnt & rhs) const noexcept { return x < rhs.x || x == rhs.x && y < rhs.y; }
	constexpr pnt operator+(const pnt &rhs) const noexcept { return pnt(x + rhs.x, y + rhs.y); }
	constexpr pnt operator-(const pnt &rhs) const noexcept { return pnt(x - rhs.x, y - rhs.y); }
	constexpr pnt operator-() const noexcept { return pnt(-x, -y); }
	constexpr lint operator*(const pnt &rhs) const noexcept { return x * rhs.x + y * rhs.y; }
	friend istream& operator>>(istream& is, pnt &p) { return is >> p.x >> p.y; }
	friend ostream& operator<<(ostream& os, const pnt &p) { return os << p.x << " " << p.y << "\n"; }
	constexpr pnt nor() const noexcept { return pnt(y, -x); }
	template<class T> T& operator[](vector<vector<T>> &v) { return v[x][y]; }
};

int main() {

	int N;
	cin >> N;

	vector<pnt> AB(N);
	map<pnt, int> mp;
	mint zero = 0;
	for (int i = 0; i < N; i++) cin >> AB[i];
	for (int i = 0; i < N; i++) {

		if (AB[i] == pnt(0, 0)) {
			zero++;
			continue;
		}

		lint g = gcd(AB[i].x, AB[i].y);
		AB[i].x /= g;
		AB[i].y /= g;
		if (AB[i].x < 0) AB[i] = -AB[i];
		mp[AB[i]]++;
	}

	DMP(mp);

	mint ans = 1;
	for (auto &[key, val] : mp) {

		pnt nor = key.nor();
		if (nor.x < 0) nor = -nor;

		auto it = mp.find(nor);
		ans *= (mint(2).pow(it == mp.end() ? 0 : it->second) + mint(2).pow(val) - 1);
		if (it != mp.end()) it->second = 0;
		val = 0;
	}

	cout << ans + zero - 1 << "\n";

	return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:123:29: error: no 'operator++(int)' declared for postfix '++' [-fpermissive]
  123 |                         zero++;
      |                         ~~~~^~