Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
int main(){
  ll n;cin>>n;
  ll x[n],y[n];
  ll ma=0;
  ll mi=1000000000000;
  vector<pll> v;
  ll dai[n],syou[n];
  for(ll i=0;i<n;i++){
    cin>>x[i]>>y[i];
    ma=max(ma,min(y[i],x[i]));
    mi=min(mi,max(x[i],y[i]));
    v.push_back(make_pair(x[i],i));
    v.push_back(make_pair(y[i],i));
    dai[i]=max(x[i],y[i]);
    syou[i]=min(x[i],y[i]);
  }
  if(n==1){
    cout<<0<<endl;
    return 0;
  }
  sort(v.begin(),v.end());
  ll ans=(v[v.size()-1].first-ma)*(mi-v[0].first);
  if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
    ans=1000000000000000000;
  }
  ll nma=0,nmi=0;
  for(ll i=0;i<n;i++){
    if(dai[i]==v[v.size()-1].first)nma++;
    if(syou[i]==v[0].first)nmi++;
  }
  ll cnt[n];
  fill(cnt,cnt+n,0);
  ll sum=0;
  ll bma,bmi;
  for(ll i=v.size()-1;i>=0;i--){
    ll now=v[i].second;
    if(cnt[now]==1){
      bma=v[i].first;
      break;
    }
    if(syou[now]==v[0].first){
      if(sum==nmi-1){
        bma=v[i].first;
        break;
      }
      else{
        sum++;
      }
    }
    cnt[now]++;
  }
  for(ll i=0;;i++){
    ll now=v[i].second;
    if(cnt[now]==1){
      bmi=v[i].first;
      break;
    }
  }
  ans=min(ans,(bma-bmi)*(v[v.size()-1].first-v[0].first));
  cout<<ans<<endl;
}
  
    

Compiler output:
a.cc: In function 'int main()':
a.cc:27:48: error: no match for 'operator>' (operand types are 'long long int' and '__gnu_cxx::__alloc_traits<std::allocator<std::pair<long long int, long long int> >, std::pair<long long int, long long int> >::value_type' {aka 'std::pair<long long int, long long int>'})
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
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:1176:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1176 |     operator>(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1176:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/regex.h:1236:5: 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>&)'
 1236 |     operator>(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1236:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/regex.h:1329:5: 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>&)'
 1329 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1329:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/regex.h:1403:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1403 |     operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1403:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::pair<long long int, long long int> >, std::pair<long long int, long long int> >::value_type' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/regex.h:1497:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1497 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1497:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/regex.h:1573:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1573 |     operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1573:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::pair<long long int, long long int> >, std::pair<long long int, long long int> >::value_type' {aka 'std::pair<long long int, long long int>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/regex.h:1673:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1673 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1673:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
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:1058:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator>(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1058 |     operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1058:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::pair<_T1, _T2>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:462:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  462 |     operator>(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:462:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/stl_iterator.h:507:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  507 |     operator>(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:507:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1714 |     operator>(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1774 |     operator>(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/string_view:695:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  695 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:695:5: note:   template argument deduction/substitution failed:
a.cc:27:61: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'long long int'
   27 |   if(v[0].first<v[1].first&&v[v.size()-1].first>v[v.size()-2]first&&v[0].second==v[v.size()-1].second){
      |                                                             ^
/usr/include/c++/14/string_view:702:5: note: candidate: 'template<class _CharT, class _Traits>