Language: C++

//	ZapZu's code hohoho
//	#pragma GCC optimize ("O3")
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define dfs_black 1
#define dfs_white -1
#define pr pair
#define vt vector
#define fastio ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

typedef double db;
typedef long long li;
typedef long double ld;

typedef pr<int, int> ii;
typedef pr<ld,ld> dd;

typedef vt<int> vi;
typedef vt<li> vli;
typedef vt<ld> vld;
typedef vt<ii> vii;

typedef map<int, int> mii;
typedef map<int, bool> mib;
typedef map<int, char> mic;

typedef set<int> s_i;
typedef set<char> s_c;

const int MOD = 1e9+7;
const li INF = 1e18;
const ld PI = 4*atan((ld)1);
map<ii, int> cnt;
li binpow(int a, int b)
{
	if(b==0) return 1;
	int temp=binpow(a, b/2);
	if(b%2) return (temp*temp%MOD)*a%MOD;
	return temp*temp%MOD;
}
ii modif(ii x)
{
	if(x.se<0) 
	{
		x.fi*=-1;
		x.se*=-1;
	}
	return x;
}
ii get_inv(ii x)
{
	if(x==mp(0, 1)) return {-1, 0};
	if(x==mp(-1, 0)) return {0, 1};
	else return modif({-x.se, x.fi});
}
signed main()
{
//	freopen(".inp", "r", stdin);
//	freopen(".out", "w", stdout);
	int n;
	cin>>n;
	for(int i=1; i<=n; i++)
	{
		int a, b;
		cin>>a>>b;
		int d=__gcd(a, b);a/=d;b/=d;
		if(!a and b) cnt[{0, 1}]++;
		else if(a and !b) cnt[{-1, 0}]++;
		else cnt[modif({a, b})]++;
	}
	int ans=1; set<ii> us;
	ans=ans*(cnt[{0, 0}]+1)%MOD;
	us.insert({0, 0});
	for(auto temp: cnt)
	{
		if(us.count(temp.fi)) continue;
		ii a=temp.fi, b=get_inv(temp.fi);
		ans=ans*((binpow(2, cnt[a])+binpow(2, cnt[b])-1)%MOD)%MOD;
		us.insert(a);
		us.insert(b);
	}
	ans--;
	while(ans<0) ans+=MOD;
	cout<<ans;
}




Compiler output:
a.cc: In function 'ii get_inv(ii)':
a.cc:60:13: error: no match for 'operator==' (operand types are 'ii' {aka 'std::pair<long long int, long long int>'} and 'std::pair<int, int>')
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |            ~^~
      |            |
      |            pair<long long int,long long int>
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181,
                 from a.cc:3:
/usr/include/c++/14/bits/regex.h:1103:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1103 |     operator==(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1103:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/regex.h:1199:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator==(__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const sub_match<_BiIter>&)'
 1199 |     operator==(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1199:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/regex.h:1274:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator==(const sub_match<_BiIter>&, __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1274 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1274:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/regex.h:1366:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1366 |     operator==(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1366:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/regex.h:1441:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1441 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1441:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/regex.h:1534:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1534 |     operator==(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1534:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/regex.h:1613:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1613 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1613:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/regex.h:2186:5: note: candidate: 'template<class _Bi_iter, class _Alloc> bool std::__cxx11::operator==(const match_results<_BiIter, _Alloc>&, const match_results<_BiIter, _Alloc>&)'
 2186 |     operator==(const match_results<_Bi_iter, _Alloc>& __m1,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:2186:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::__cxx11::match_results<_BiIter, _Alloc>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/bits/stl_pair.h:1033:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator==(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1033 |     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1033:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   deduced conflicting types for parameter '_T1' ('long long int' and 'int')
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:441:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  441 |     operator==(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:441:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/stl_iterator.h:486:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  486 |     operator==(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:486:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1667 |     operator==(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::move_iterator<_IteratorL>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1737 |     operator==(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::move_iterator<_IteratorL>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
In file included from /usr/include/c++/14/bits/char_traits.h:42,
                 from /usr/include/c++/14/string:42,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/postypes.h:192:5: note: candidate: 'template<class _StateT> bool std::operator==(const fpos<_StateT>&, const fpos<_StateT>&)'
  192 |     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:192:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::fpos<_StateT>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
In file included from /usr/include/c++/14/string:43:
/usr/include/c++/14/bits/allocator.h:235:5: note: candidate: 'template<class _T1, class _T2> bool std::operator==(const allocator<_CharT>&, const allocator<_T2>&)'
  235 |     operator==(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:235:5: note:   template argument deduction/substitution failed:
a.cc:60:22: note:   'ii' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::allocator<_CharT>'
   60 |         if(x==mp(0, 1)) return {-1, 0};
      |                      ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/usr/include/c++/14/string_view:629:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Trait