In file included from /usr/include/c++/13/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51,
                 from answer.code:1:
/usr/include/c++/13/bits/stl_algo.h: In instantiation of ‘void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’:
/usr/include/c++/13/bits/stl_algo.h:1859:25:   required from ‘void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:1950:31:   required from ‘void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:4861:18:   required from ‘void std::sort(_RAIter, _RAIter) [with _RAIter = int]’
answer.code:20:7:   required from here
/usr/include/c++/13/bits/stl_algo.h:1822:17: error: no type named ‘value_type’ in ‘struct std::iterator_traits<int>’
 1822 |                 __val = _GLIBCXX_MOVE(*__i);
      |                 ^~~~~
/usr/include/c++/13/bits/stl_algo.h:1824:15: error: invalid type argument of unary ‘*’ (have ‘int’)
 1824 |               *__first = _GLIBCXX_MOVE(__val);
      |               ^~~~~~~~
/usr/include/c++/13/bits/stl_algo.h:1822:17: error: no type named ‘value_type’ in ‘struct std::iterator_traits<int>’
 1822 |                 __val = _GLIBCXX_MOVE(*__i);
      |                 ^~~~~
In file included from /usr/include/c++/13/bits/stl_algobase.h:71,
                 from /usr/include/c++/13/algorithm:60:
/usr/include/c++/13/bits/predefined_ops.h: In instantiation of ‘constexpr bool __gnu_cxx::__ops::_Iter_less_iter::operator()(_Iterator1, _Iterator2) const [with _Iterator1 = int; _Iterator2 = int]’:
/usr/include/c++/13/bits/stl_algo.h:1819:14:   required from ‘void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:1859:25:   required from ‘void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:1950:31:   required from ‘void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:4861:18:   required from ‘void std::sort(_RAIter, _RAIter) [with _RAIter = int]’
answer.code:20:7:   required from here
/usr/include/c++/13/bits/predefined_ops.h:45:16: error: invalid type argument of unary ‘*’ (have ‘int’)
   45 |       { return *__it1 < *__it2; }
      |                ^~~~~~
/usr/include/c++/13/bits/predefined_ops.h:45:25: error: invalid type argument of unary ‘*’ (have ‘int’)
   45 |       { return *__it1 < *__it2; }
      |                         ^~~~~~
In file included from /usr/include/c++/13/bits/stl_algo.h:61:
/usr/include/c++/13/bits/stl_heap.h: In instantiation of ‘void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’:
/usr/include/c++/13/bits/stl_algo.h:1635:23:   required from ‘void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:1910:25:   required from ‘void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:1926:27:   required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = int; _Size = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:1947:25:   required from ‘void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]’
/usr/include/c++/13/bits/stl_algo.h:4861:18:   required from ‘void std::sort(_RAIter, _RAIter) [with _RAIter = int]’
answer.code:20:7:   required from here
/usr/include/c++/13/bits/stl_heap.h:344:11: error: no type named ‘value_type’ in ‘struct std::iterator_traits<int>’
  344 |           _ValueType;
      |           ^~~~~~~~~~
/usr/include/c++/13/bits/stl_heap.h:346:11: error: no type named ‘difference_type’ in ‘struct std::iterator_traits<int>’
  346 |           _DistanceType;
      |           ^~~~~~~~~~~~~
/usr/include/c++/13/bits/stl_heap.h: In instantiation of ‘void std::__pop_heap(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIte...