Language: C++

#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
typedef long long ll;
#define MOD 1000000007
using namespace std;
ll gcd(ll a, ll b) {
    if(a < b)
        gcd(b, a);
    ll r = 1;
    while(r != 0) {
        r = a % b;
        a = b;
        b = r;
    }
    return a;
}
ll modpow(ll a, ll n, ll mod = MOD) {
    ll res = 1;
    while(n > 0) {
        if(n & 1)
            res = res * a % mod;
        a = a * a % mod;
        n >>= 1;
    }
    return res;
}
ll sign(ll n) {
    if(n >= 0) {
        return 1;
    } else {
        return -1;
    }
}
int main() {
    int n;
    cin >> n;
    vector<ll> a(n), b(n);
    map<pair<ll, ll>, ll> r1;
    for(int i = 0; i < n; i++) {
        cin >> a[i] >> b[i];
        if(a[i] == 0 && b[i] == 0) {
            r1[make_pair(0, 0)]++;
        } else if(a[i] == 0 && b[i] != 0) {
            r1[make_pair(0, 1)]++;
        } else if(a[i] != 0 && b[i] == 0) {
            r1[make_pair(1, 0)]++;
        } else {
            ll g = gcd(abs(a[i]), abs(b[i]));
            ll sig = sign(a[i] * b[i]);
            r1[make_pair(sig * abs(a[i]) / g, abs(b[i]) / g)]++;
        }
    }
    ll ans = 1;
    for(auto e : r1) {
        if(e.second == 0) {
            continue;
        }
        if(e.first == make_pair(0, 0)) {
            continue;
        }
        pair<int, int> ort;
        if(e.first == make_pair(0LL, 1LL)) {
            ort = make_pair(1, 0);
        } else if(e.first == make_pair(1LL, 0LL)) {
            ort = make_pair(0, 1);
        } else {
            ort = make_pair(-sign(e.first.first) * abs(e.first.second),
                            abs(e.first.first));
            ;
        }
        ans *= modpow(2, e.second) + modpow(2, r1[ort]) - 1;
        ans %= MOD;
        r1[ort] = 0;
        r1[e.first] = 0;
    }
    cout << (r1[make_pair(0, 0)] + ans - 1 + MOD) % MOD << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:58:20: error: no match for 'operator==' (operand types are 'const std::pair<long long int, long long int>' and 'std::pair<int, int>')
   58 |         if(e.first == make_pair(0, 0)) {
      |            ~~~~~~~ ^~ ~~~~~~~~~~~~~~~
      |              |                 |
      |              |                 pair<int,int>
      |              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: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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::match_results<_BiIter, _Alloc>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   deduced conflicting types for parameter '_T1' ('long long int' and 'int')
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::fpos<_StateT>'
   58 |         if(e.first == make_pair(0, 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:58:37: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::allocator<_CharT>'
   58 |         if(e.first == make_pair(0, 0)) {
      |                                     ^
In file