/in/foo.cc: In function 'int main()':
/in/foo.cc:25:54: error: use of 'auto' in lambda parameter declaration only available with '-std=c++14' or '-std=gnu++14'
   25 |     sort(integers.begin(), integers.end(), [] (const auto& a, const auto& b) {
      |                                                      ^~~~
/in/foo.cc:25:69: error: use of 'auto' in lambda parameter declaration only available with '-std=c++14' or '-std=gnu++14'
   25 |     sort(integers.begin(), integers.end(), [] (const auto& a, const auto& b) {
      |                                                                     ^~~~
/in/foo.cc: In lambda function:
/in/foo.cc:26:15: error: request for member 'first' in 'a', which is of non-class type 'const int'
   26 |         if (a.first != b.first)
      |               ^~~~~
/in/foo.cc:26:26: error: request for member 'first' in 'b', which is of non-class type 'const int'
   26 |         if (a.first != b.first)
      |                          ^~~~~
/in/foo.cc:27:22: error: request for member 'first' in 'a', which is of non-class type 'const int'
   27 |             return a.first < b.first;
      |                      ^~~~~
/in/foo.cc:27:32: error: request for member 'first' in 'b', which is of non-class type 'const int'
   27 |             return a.first < b.first;
      |                                ^~~~~
/in/foo.cc:28:18: error: request for member 'second' in 'a', which is of non-class type 'const int'
   28 |         return a.second < b.second;
      |                  ^~~~~~
/in/foo.cc:28:29: error: request for member 'second' in 'b', which is of non-class type 'const int'
   28 |         return a.second < b.second;
      |                             ^~~~~~
In file included from /usr/include/c++/12/bits/stl_algobase.h:71,
                 from /usr/include/c++/12/algorithm:60,
                 from /in/foo.cc:1:
/usr/include/c++/12/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_comp_iter<_Compare>::operator()(_Iterator1, _Iterator2) [with _Iterator1 = __gnu_cxx::__normal_iterator<std::pair<int, int>*, std::vector<std::pair<int, int> > >; _Iterator2 = __gnu_cxx::__normal_iterator<std::pair<int, int>*, std::vector<std::pair<int, int> > >; _Compare = main()::<lambda(const int&, const int&)>]':
/usr/include/c++/12/bits/stl_algo.h:1809:14:   required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_algo.h:1849:25:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_algo.h:1940:31:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_algo.h:4853:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = main()::<lambda(const int&, const int&)>]'
/in/foo.cc:25:9:   required from here
/usr/include/c++/12/bits/predefined_ops.h:158:30: error: no match for call to '(main()::<lambda(const int&, const int&)>) (std::pair<int, int>&, std::pair<int, int>&)'
  158 |         { return bool(_M_comp(*__it1, *__it2)); }
      |                       ~~~~~~~^~~~~~~~~~~~~~~~
/in/foo.cc:25:44: note: candidate: 'main()::<lambda(const int&, const int&)>'
   25 |     sort(integers.begin(), integers.end(), [] (const auto& a, const auto& b) {
      |                                            ^
/in/foo.cc:25:44: note:   no known conversion for argument 1 from 'std::pair<int, int>' to 'const int&'
/usr/include/c++/12/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Val_comp_iter<_Compare>::operator()(_Value&, _Iterator) [with _Value = std::pair<int, int>; _Iterator = __gnu_cxx::__normal_iterator<std::pair<int, int>*, std::vector<std::pair<int, int> > >; _Compare = main()::<lambda(const int&, const int&)>]':
/usr/include/c++/12/bits/stl_algo.h:1789:20:   required from 'void std::__unguarded_linear_insert(_RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = __gnu_cxx::__ops::_Val_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_algo.h:1817:36:   required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_algo.h:1849:25:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_algo.h:1940:31:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_algo.h:4853:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = main()::<lambda(const int&, const int&)>]'
/in/foo.cc:25:9:   required from here
/usr/include/c++/12/bits/predefined_ops.h:240:30: error: no match for call to '(main()::<lambda(const int&, const int&)>) (std::pair<int, int>&, std::pair<int, int>&)'
  240 |         { return bool(_M_comp(__val, *__it)); }
      |                       ~~~~~~~^~~~~~~~~~~~~~
/in/foo.cc:25:44: note: candidate: 'main()::<lambda(const int&, const int&)>'
   25 |     sort(integers.begin(), integers.end(), [] (const auto& a, const auto& b) {
      |                                            ^
/in/foo.cc:25:44: note:   no known conversion for argument 1 from 'std::pair<int, int>' to 'const int&'
/usr/include/c++/12/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_comp_val<_Compare>::operator()(_Iterator, _Value&) [with _Iterator = __gnu_cxx::__normal_iterator<std::pair<int, int>*, std::vector<std::pair<int, int> > >; _Value = std::pair<int, int>; _Compare = main()::<lambda(const int&, const int&)>]':
/usr/include/c++/12/bits/stl_heap.h:140:48:   required from 'void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Distance = long int; _Tp = pair<int, int>; _Compare = __gnu_cxx::__ops::_Iter_comp_val<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_heap.h:247:23:   required from 'void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Distance = long int; _Tp = pair<int, int>; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_heap.h:356:22:   required from 'void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<pair<int, int>*, vector<pair<int, int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<main()::<lambda(const int&, const int&)> >]'
/usr/include/c++/12/bits/stl_