Language: C++

#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e9 + 7;

int sign(int64_t x) {
    return (x > 0) ? +1 : -1;
}

void normalize(pair<int64_t, int64_t> &p) {
    int g = __gcd(p.first, p.second);
    p.first /= g;
    p.second /= g;

    if(p.first == 0) {
        p.second = 1;
    }

    if(p.second == 0) {
        p.first = -1;
    }

    if(sign(p.first) * sign(p.second) > 0) {
        if(p.first < 0) {
            p.first *= -1;
            p.second *= -1;
        }
    } else {
        if(p.first > 0) {
            p.first *= -1;
            p.second *= -1;
        }
    }
}

int64_t quickPow(int64_t a, int64_t b) {
    if(b == 0)
        return 1;

    int64_t ans = quickPow(a, b / 2);

    ans = (ans * ans) % MOD;
    if(b % 2)
        ans = (ans * a) % MOD;

    return ans;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;  cin >> n;
    vector<pair<int64_t, int64_t> > a(n);

    for(auto &val : a)  cin >> val.first >> val.second;

    map<pair<int64_t, int64_t>, int64_t> mp;

    for(auto val : a) {
        if(val == make_pair(0LL, 0LL))
            continue;
        normalize(val);
        mp[val]++;
    }

    int64_t ans = 1;

    for(auto link : mp) {
        auto vect = link.first;
        int64_t cnt = link.second;

        if(cnt == 0)
            continue;

        decltype(vect) perp = {-vect.second, vect.first};
        normalize(perp);

        if(mp[perp] > 0) {
            int64_t a = cnt;
            int64_t b = mp[perp];
            int64_t mult = ((quickPow(2, a) + quickPow(2, b)) % MOD);
            mult = (((mult - 1) % MOD) + MOD) % MOD;
            ans = (ans * mult) % MOD;
            //cerr << "!!! " << vect.first << ' ' << vect.second << ' ' << mult << '\n';
            mp[perp] = 0;
        } else {
            //cerr << vect.first << ' ' << vect.second << ' ' << quickPow(2, cnt) << '\n';
            ans = (ans * quickPow(2, cnt)) % MOD;
        }
    }

    ans = (((ans - 1) % MOD) + MOD) % MOD;

    cout << ans << '\n';

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:60:16: error: no match for 'operator==' (operand types are 'std::pair<long int, long int>' and 'std::pair<long long int, long long int>')
   60 |         if(val == make_pair(0LL, 0LL))
      |            ~~~ ^~ ~~~~~~~~~~~~~~~~~~~
      |            |               |
      |            |               pair<long long int,long long int>
      |            pair<long int,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:1:
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::__cxx11::match_results<_BiIter, _Alloc>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
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:60:37: note:   deduced conflicting types for parameter '_T1' ('long int' and 'long long int')
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
/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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::fpos<_StateT>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
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:60:37: note:   'std::pair<long int, long int>' is not derived from 'const std::allocator<_CharT>'
   60 |         if(val == make_pair(0LL, 0LL))
      |                                     ^
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: 'templa