answer.code: In lambda function:
answer.code:44:92: error: no match for ‘operator!=’ (operand types are ‘const std::pair<int, int>’ and ‘std::pair<long long int, long long int>’)
   44 |             if (auto it = vis.lower_bound({i + 1, j}); i + 1 < n && it != vis.end() && *it != pair{i + 1, j}) {
      |                                                                                        ~~~ ^~ ~~~~~~~~~~~~~~
      |                                                                                        |      |
      |                                                                                        |      pair<long long int,long long int>
      |                                                                                        pair<int,int>
In file included from /usr/include/c++/13/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:181,
                 from answer.code:2:
/usr/include/c++/13/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>&)’ (reversed)
 1274 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/regex.h:1274:5: note:   template argument deduction/substitution failed:
answer.code:44:108: note:   ‘std::pair<long long int, long long int>’ is not derived from ‘const std::__cxx11::sub_match<_BiIter>’
   44 |             if (auto it = vis.lower_bound({i + 1, j}); i + 1 < n && it != vis.end() && *it != pair{i + 1, j}) {
      |                                                                                                            ^
/usr/include/c++/13/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*)’ (reversed)
 1441 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/regex.h:1441:5: note:   template argument deduction/substitution failed:
answer.code:44:108: note:   ‘std::pair<long long int, long long int>’ is not derived from ‘const std::__cxx11::sub_match<_BiIter>’
   44 |             if (auto it = vis.lower_bound({i + 1, j}); i + 1 < n && it != vis.end() && *it != pair{i + 1, j}) {
      |                                                                                                            ^
/usr/include/c++/13/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&)’ (reversed)
 1613 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/regex.h:1613:5: note:   template argument deduction/substitution failed:
answer.code:44:108: note:   ‘std::pair<long long int, long long int>’ is not derived from ‘const std::__cxx11::sub_match<_BiIter>’
   44 |             if (auto it = vis.lower_bound({i + 1, j}); i + 1 < n && it != vis.end() && *it != pair{i + 1, j}) {
      |                                                                                                            ^
In file included from /usr/include/c++/13/bits/stl_algobase.h:67,
                 from /usr/include/c++/13/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51:
/usr/include/c++/13/bits/stl_iterator.h:534:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const reverse_iterator<_IteratorL>&, const reverse_iterator<_IteratorR>&) requires requires{{std::operator==::__x->base() == std::operator==::__y->base()} -> decltype(auto) [requires std::convertible_to<<placeholder>, bool>];}’ (reversed)
  534 |     operator==(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_iterator.h:534:5: note:   template argument deduction/substitution failed:
answer.code:44:108: note:   ‘std::pair<long long int, long long int>’ is not derived from ‘const std::reverse_iterator<_IteratorL>’
   44 |             if (auto it = vis.lower_bound({i + 1, j}); i + 1 < n && it != vis.end() && *it != pair{i + 1, j}) {
      |                                                                                                            ^
/usr/include/c++/13/bits/stl_iterator.h:1678:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&) requires requires{{std::operator==::__x->base() == std::operator==::__y->base()} -> decltype(auto) [requires std::convertible_to<<placeholder>, bool>];}’ (reversed)
 1678 |     operator==(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_iterator.h:1678:5: note:   template argument deduction/substitution failed:
answer.code:44:108: note:   ‘std::pair<long long int, long long int>’ is no...