Language: C++

#include<iostream>
#include<sstream>
#include<fstream>
#include<string>
#include<vector>
#include<deque>
#include<queue>
#include<stack>
#include<set>
#include<map>
#include<algorithm>
#include<functional>
#include<utility>
#include<bitset>
#include<cmath>
#include<cstdlib>
#include<ctime>
#include<cstdio>
#include<cstring>
using namespace std;
typedef long long ll;
int n;
pair<int,int> x[200010];
multiset<int> b,r;
ll ans;
int main()
{
	cin>>n; 
    for (int i=1;i<=n;i++)
    {
        cin>>x[i].first>>x[i].second;
        if (x[i].first>x[i].second) swap(x[i].first,x[i].second);
        b.insert(x[i].first),r.insert(x[i].second);
    }
    ans=(b.rbegin()-*b.begin())*(*r.rbegin()-*r.begin());
    sort(x+1,x+n+1);
    for (int i=1;i<=n;i++)
    {
        b.erase(b.find(x[i].first)),r.insert(x[i].first);
        r.erase(r.find(x[i].second)),b.insert(x[i].second);
        ans=min(ans,1LL*(*b.rbegin()-*b.begin())*(*r.rbegin()-*r.begin()));
    }
    cout<<ans;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:35:32: error: no match for 'operator*' (operand types are 'std::reverse_iterator<std::_Rb_tree_const_iterator<int> >' and 'int')
   35 |     ans=(b.rbegin()-*b.begin())*(*r.rbegin()-*r.begin());
      |         ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
      |                    |                        |
      |                    |                        int
      |                    std::reverse_iterator<std::_Rb_tree_const_iterator<int> >
In file included from /usr/include/c++/14/string:48,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:257:7: note: candidate: 'constexpr std::reverse_iterator<_Iterator>::reference std::reverse_iterator<_Iterator>::operator*() const [with _Iterator = std::_Rb_tree_const_iterator<int>; reference = const int&]'
  257 |       operator*() const
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:257:7: note:   candidate expects 0 arguments, 1 provided
/usr/include/c++/14/bits/stl_iterator.h: In instantiation of 'constexpr std::reverse_iterator<_Iterator> std::reverse_iterator<_Iterator>::operator-(difference_type) const [with _Iterator = std::_Rb_tree_const_iterator<int>; difference_type = long int]':
a.cc:35:30:   required from here
   35 |     ans=(b.rbegin()-*b.begin())*(*r.rbegin()-*r.begin());
      |                              ^
/usr/include/c++/14/bits/stl_iterator.h:364:41: error: no match for 'operator+' (operand types are 'const std::_Rb_tree_const_iterator<int>' and 'std::reverse_iterator<std::_Rb_tree_const_iterator<int> >::difference_type' {aka 'long int'})
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/stl_iterator.h:627:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_Iterator> std::operator+(typename reverse_iterator<_Iterator>::difference_type, const reverse_iterator<_Iterator>&)'
  627 |     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:627:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'std::reverse_iterator<std::_Rb_tree_const_iterator<int> >::difference_type' {aka 'long int'}
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename move_iterator<_IteratorL>::difference_type, const move_iterator<_IteratorL>&)'
 1798 |     operator+(typename move_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'std::reverse_iterator<std::_Rb_tree_const_iterator<int> >::difference_type' {aka 'long int'}
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
In file included from /usr/include/c++/14/string:54:
/usr/include/c++/14/bits/basic_string.h:3598:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3598 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3598:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   'const std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3616 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   mismatched types 'const _CharT*' and 'std::_Rb_tree_const_iterator<int>'
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3635 |     operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::reverse_iterator<std::_Rb_tree_const_iterator<int> >::difference_type' {aka 'long int'}
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3652 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   'const std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, _CharT)'
 3670 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   'const std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3682 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const std::_Rb_tree_const_iterator<int>' have incompatible cv-qualifiers
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3689 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   'const std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3696 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator.h:364:41: note:   types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const std::_Rb_tree_const_iterator<int>' have incompatible cv-qualifiers
  364 |       { return reverse_iterator(current + __n); }
      |                                 ~~~~~~~~^~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3719 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note:   template argument deduction/substitution fa