Language: C++

#include <bits/stdc++.h>
#include <stdlib.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef pair<ll,ll> llP;

ll mod(ll a, ll b){
  ll ret=a%b;
  if(ret<0) ret+=b;
  return ret;
}

ll modpow(ll a,ll b,ll c){
  ll res=1;
  while(b>0){
    if(b&1) res=mod(res*a,c);
    a=mod(a*a,c);
    b>>=1;
  }
  return res;
}

int main() {
  ll MOD=1000000007;
  int n;
  cin>>n;
  ll a[n],b[n];
  map<llP,int> memo;
  map<llP,int> memo2;
  for(int i=0;i<n;i++){
    cin>>a[i]>>b[i];
    ll c=abs(a[i]),d=abs(b[i]);
    if(c==0 and d==0) memo[make_pair(0,0)]++;
    else if(c==0) memo[make_pair(0,-1)]++;
    else if(d==0) memo[make_pair(1,0)]++;
    else{
      while(c%d!=0){
        ll temp=d;
        d=c%d;
        c=temp;
      }
      a[i]/=d;b[i]/=d;
      if(a[i]<0) {
        a[i]=-a[i];
        b[i]=-b[i];
      }
      memo[make_pair(a[i],b[i])]++;
    }
  }
  if(n==2 and a[0]*a[1]+b[0]*b[1]==0){
    cout<<0<<endl;
    return 0;
  }
  ll ans=0;
  vector<ll> anss;
  for(auto itr=memo.begin();itr!=memo.end();itr++){
    if(itr->first==make_pair(0,0)) continue;
    ll f=itr->first.first,s=itr->first.second;
    if(s<0){
      if(memo2[make_pair(f,s)]>0)continue;
      if(memo.count(make_pair(-s,f))){
        anss.push_back(memo[make_pair(f,s)]);
        anss.push_back(memo[make_pair(-s,f)]);
        memo2[make_pair(f,s)]++;memo2[make_pair(-s,f)]++;
      }
      else ans+=itr->second;
    }
    else{
      if(memo2[make_pair(f,s)]>0)continue;
      if(memo.count(make_pair(s,-f))){
        anss.push_back(memo[make_pair(f,s)]);
        anss.push_back(memo[make_pair(s,-f)]);
        memo2[make_pair(f,s)]++;memo2[make_pair(s,-f)]++;
      }
      else ans+=itr->second;
    }
  }
  ll sum=1;
  if(ans!=0) sum=mod(modpow(2,ans,MOD),MOD);
  for(int i=0;i<anss.size()-1;i+=2){
    sum=mod(sum*mod(((modpow(2,anss[i],MOD))+modpow(2,anss[i+1],MOD)-1),MOD),MOD);
  }
  cout<<mod(sum-1,MOD)<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:58:18: error: no match for 'operator==' (operand types are 'const std::pair<long long int, long long int>' and 'std::pair<int, int>')
   58 |     if(itr->first==make_pair(0,0)) continue;
      |        ~~~~~~~~~~^~~~~~~~~~~~~~~~
      |             |               |
      |             |               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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: 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(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::__cxx11::match_results<_BiIter, _Alloc>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
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:58:33: note:   deduced conflicting types for parameter '_T1' ('long long int' and 'int')
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
/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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::fpos<_StateT>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
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:58:33: note:   'const std::pair<long long int, long long int>' is not derived from 'const std::allocator<_CharT>'
   58 |     if(itr->first==make_pair(0,0)) continue;
      |                                 ^
In file includ