Submission #1160619

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
11606192025-03-02 17:06:24NewtonabcBubble Sort 2 (JOI18_bubblesort2)C++20
Compilation error
0 ms0 KiB
#include "bubblesort2.h"
#include<bits/stdc++.h>
using namespace std;
const int N=1<<21;
struct stree{
vector<int> lz,s,arr;
int sz;
void init(int n){
lz.resize(n,0);
s.resize(n,0);
arr.resize(n,0);
}
void pushlz(int l,int r,int idx){
if(!lz[idx]) return;
s[idx]+=lz[idx];
if(l!=r) lz[idx*2]+=lz[idx],lz[idx*2+1]+=lz[idx];
lz[idx]=0;
}
void build(int l,int r,int idx){
if(l==r){
s[idx]=arr[l];
return;
}
int m=(l+r)/2;
build(l,m,idx*2);
build(m+1,r,idx*2+1);
s[idx]=max(s[idx*2],s[idx*2+1]);
}
void update(int l,int r,int idx,int a,int b,int val){
if(a>b) return;
 
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Compilation message (stderr)

In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h: In instantiation of 'constexpr bool __gnu_cxx::__ops::_Iter_less_val::operator()(_Iterator, _Value&) const [with _Iterator = __gnu_cxx::__normal_iterator<std::pair<int, int>*, std::vector<std::pair<int, int> > >; _Value = const int]':
/usr/include/c++/11/bits/stl_algobase.h:1464:14:   required from 'constexpr _ForwardIterator std::__lower_bound(_ForwardIterator, _ForwardIterator, const _Tp&, _Compare) [with _ForwardIterator = __gnu_cxx::__normal_iterator<std::pair<int, int>*, std::vector<std::pair<int, int> > >; _Tp = int; _Compare = __gnu_cxx::__ops::_Iter_less_val]'
/usr/include/c++/11/bits/stl_algobase.h:1499:32:   required from 'constexpr _ForwardIterator std::lower_bound(_ForwardIterator, _ForwardIterator, const _Tp&) [with _ForwardIterator = __gnu_cxx::__normal_iterator<std::pair<int, int>*, std::vector<std::pair<int, int> > >; _Tp = int]'
bubblesort2.cpp:69:18:   required from here
/usr/include/c++/11/bits/predefined_ops.h:69:22: error: no match for 'operator<' (operand types are 'std::pair<int, int>' and 'const int')
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:67,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_iterator.h:1129:5: note: candidate: 'template<class _IteratorL, class _IteratorR, class _Container> constexpr std::__detail::__synth3way_t<_IteratorR, _IteratorL> __gnu_cxx::operator<=>(const __gnu_cxx::__normal_iterator<_IteratorL, _Container>&, const __gnu_cxx::__normal_iterator<_IteratorR, _Container>&)' (reversed)
 1129 |     operator<=>(const __normal_iterator<_IteratorL, _Container>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_iterator.h:1129:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/regex:63,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:110,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/regex.h:1244:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Alloc> auto std::__cxx11::operator<=>(const std::__cxx11::sub_match<_BiIter>&, std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)' (reversed)
 1244 |     operator<=>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/11/bits/regex.h:1244:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/regex:63,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:110,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/regex.h:1412:5: note: candidate: 'template<class _Bi_iter> auto std::__cxx11::operator<=>(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)' (reversed)
 1412 |     operator<=>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/11/bits/regex.h:1412:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/regex:63,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:110,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/regex.h:1585:5: note: candidate: 'template<class _Bi_iter> auto std::__cxx11::operator<=>(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)' (reversed)
 1585 |     operator<=>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/11/bits/regex.h:1585:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:67,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_iterator.h:538:5: note: candidate: 'template<class _IteratorL, class _IteratorR>  requires  three_way_comparable_with<_IteratorR, _IteratorL, std::partial_ordering> constexpr std::compare_three_way_result_t<_IteratorL, _IteratorR> std::operator<=>(const std::reverse_iterator<_IteratorL>&, const std::reverse_iterator<_IteratorR>&)' (reversed)
  538 |     operator<=>(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_iterator.h:538:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::reverse_iterator<_IteratorL>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:67,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_iterator.h:1596:5: note: candidate: 'template<class _IteratorL, class _IteratorR>  requires  three_way_comparable_with<_IteratorR, _IteratorL, std::partial_ordering> constexpr std::compare_three_way_result_t<_IteratorL, _IteratorR> std::operator<=>(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)' (reversed)
 1596 |     operator<=>(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_iterator.h:1596:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/basic_string.h:48,
                 from /usr/include/c++/11/string:55,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/string_view:556:5: note: candidate: 'template<class _CharT, class _Traits> constexpr decltype (__char_traits_cmp_cat<_Traits>(0)) std::operator<=>(std::basic_string_view<_CharT, _Traits>, std::__type_identity_t<std::basic_string_view<_CharT, _Traits> >)' (reversed)
  556 |     operator<=>(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/11/string_view:556:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/string:55,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/basic_string.h:6276:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> decltype (__char_traits_cmp_cat<_Traits>(0)) std::operator<=>(const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)' (reversed)
 6276 |     operator<=>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/11/bits/basic_string.h:6276:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/functional:54,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/tuple:1557:5: note: candidate: 'template<class ... _Tps, class ... _Ups> constexpr std::common_comparison_category_t<decltype (std::__detail::__synth3way(declval<_Tps&>(), declval<_Ups&>()))...> std::operator<=>(const std::tuple<_Tps ...>&, const std::tuple<_UTypes ...>&)' (reversed)
 1557 |     operator<=>(const tuple<_Tps...>& __t, const tuple<_Ups...>& __u)
      |     ^~~~~~~~
/usr/include/c++/11/tuple:1557:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::tuple<_Tps ...>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/locale_conv.h:41,
                 from /usr/include/c++/11/locale:43,
                 from /usr/include/c++/11/iomanip:43,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/unique_ptr.h:895:5: note: candidate: 'template<class _Tp, class _Dp, class _Up, class _Ep>  requires  three_way_comparable_with<typename std::unique_ptr<_Tp, _Dp>::pointer, typename std::unique_ptr<_Up, _Ep>::pointer, std::partial_ordering> std::compare_three_way_result_t<typename std::unique_ptr<_Tp, _Dp>::pointer, typename std::unique_ptr<_Up, _Ep>::pointer> std::operator<=>(const std::unique_ptr<_Tp, _Dp>&, const std::unique_ptr<_Up, _Ep>&)' (reversed)
  895 |     operator<=>(const unique_ptr<_Tp, _Dp>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/unique_ptr.h:895:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::unique_ptr<_Tp, _Dp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/locale_conv.h:41,
                 from /usr/include/c++/11/locale:43,
                 from /usr/include/c++/11/iomanip:43,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/unique_ptr.h:903:5: note: candidate: 'template<class _Tp, class _Dp>  requires  three_way_comparable<typename std::unique_ptr<_Tp, _Dp>::pointer, std::partial_ordering> std::compare_three_way_result_t<typename std::unique_ptr<_Tp, _Dp>::pointer> std::operator<=>(const std::unique_ptr<_Tp, _Dp>&, std::nullptr_t)' (reversed)
  903 |     operator<=>(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
      |     ^~~~~~~~
/usr/include/c++/11/bits/unique_ptr.h:903:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::unique_ptr<_Tp, _Dp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/shared_ptr.h:53,
                 from /usr/include/c++/11/memory:77,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:82,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/shared_ptr_base.h:1422:5: note: candidate: 'template<class _Tp, class _Up, __gnu_cxx::_Lock_policy _Lp> std::strong_ordering std::operator<=>(const std::__shared_ptr<_Tp1, _Lp>&, const std::__shared_ptr<_Tp2, _Lp>&)' (reversed)
 1422 |     operator<=>(const __shared_ptr<_Tp, _Lp>& __a,
      |     ^~~~~~~~
/usr/include/c++/11/bits/shared_ptr_base.h:1422:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::__shared_ptr<_Tp1, _Lp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/shared_ptr.h:53,
                 from /usr/include/c++/11/memory:77,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:82,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/shared_ptr_base.h:1428:5: note: candidate: 'template<class _Tp, __gnu_cxx::_Lock_policy _Lp> std::strong_ordering std::operator<=>(const std::__shared_ptr<_Tp, _Lp>&, std::nullptr_t)' (reversed)
 1428 |     operator<=>(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
      |     ^~~~~~~~
/usr/include/c++/11/bits/shared_ptr_base.h:1428:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::__shared_ptr<_Tp, _Lp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/memory:77,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:82,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/shared_ptr.h:449:5: note: candidate: 'template<class _Tp, class _Up> std::strong_ordering std::operator<=>(const std::shared_ptr<_Tp>&, const std::shared_ptr<_Tp>&)' (reversed)
  449 |     operator<=>(const shared_ptr<_Tp>& __a,
      |     ^~~~~~~~
/usr/include/c++/11/bits/shared_ptr.h:449:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::shared_ptr<_Tp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/memory:77,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:82,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/shared_ptr.h:455:5: note: candidate: 'template<class _Tp> std::strong_ordering std::operator<=>(const std::shared_ptr<_Tp>&, std::nullptr_t)' (reversed)
  455 |     operator<=>(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
      |     ^~~~~~~~
/usr/include/c++/11/bits/shared_ptr.h:455:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::shared_ptr<_Tp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:130,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/optional:1096:5: note: candidate: 'template<class _Tp, class _Up>  requires  three_way_comparable_with<_Up, _Tp, std::partial_ordering> constexpr std::compare_three_way_result_t<_IteratorL, _IteratorR> std::operator<=>(const std::optional<_Tp>&, const std::optional<_Up>&)' (reversed)
 1096 |     operator<=>(const optional<_Tp>& __x, const optional<_Up>& __y)
      |     ^~~~~~~~
/usr/include/c++/11/optional:1096:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::optional<_Tp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:130,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/optional:1111:5: note: candidate: 'template<class _Tp> constexpr std::strong_ordering std::operator<=>(const std::optional<_Tp>&, std::nullopt_t)' (reversed)
 1111 |     operator<=>(const optional<_Tp>& __x, nullopt_t) noexcept
      |     ^~~~~~~~
/usr/include/c++/11/optional:1111:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::optional<_Tp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:130,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/optional:1253:5: note: candidate: 'template<class _Tp, class _Up>  requires !(__is_optional_v<_Up>) && (three_way_comparable_with<_Tp, _Up, std::partial_ordering>) constexpr std::compare_three_way_result_t<_IteratorL, _IteratorR> std::operator<=>(const std::optional<_Tp>&, const _Up&)' (reversed)
 1253 |     operator<=>(const optional<_Tp>& __x, const _Up& __v)
      |     ^~~~~~~~
/usr/include/c++/11/optional:1253:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::optional<_Tp>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:67,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_iterator.h:1146:5: note: candidate: 'template<class _Iterator, class _Container> constexpr std::__detail::__synth3way_t<_T1> __gnu_cxx::operator<=>(const __gnu_cxx::__normal_iterator<_Iterator, _Container>&, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)' (rewritten)
 1146 |     operator<=>(const __normal_iterator<_Iterator, _Container>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_iterator.h:1146:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const __gnu_cxx::__normal_iterator<_Iterator, _Container>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/regex:63,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:110,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/regex.h:1072:5: note: candidate: 'template<class _BiIter> auto std::__cxx11::operator<=>(const std::__cxx11::sub_match<_BiIter>&, const std::__cxx11::sub_match<_BiIter>&)' (rewritten)
 1072 |     operator<=>(const sub_match<_BiIter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/11/bits/regex.h:1072:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:64,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_pair.h:473:5: note: candidate: 'template<class _T1, class _T2> constexpr std::common_comparison_category_t<decltype (std::__detail::__synth3way(declval<_T1&>(), declval<_T1&>())), decltype (std::__detail::__synth3way(declval<_T2&>(), declval<_T2&>()))> std::operator<=>(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)' (rewritten)
  473 |     operator<=>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_pair.h:473:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   mismatched types 'const std::pair<_T1, _T2>' and 'const int'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:67,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_iterator.h:554:5: note: candidate: 'template<class _Iterator>  requires  three_way_comparable<_Iterator, std::partial_ordering> constexpr std::compare_three_way_result_t<_Iterator, _Iterator> std::operator<=>(const std::reverse_iterator<_IteratorL>&, const std::reverse_iterator<_IteratorL>&)' (rewritten)
  554 |     operator<=>(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_iterator.h:554:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::reverse_iterator<_IteratorL>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:67,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_iterator.h:1655:5: note: candidate: 'template<class _Iterator>  requires  three_way_comparable<_Iterator, std::partial_ordering> constexpr std::compare_three_way_result_t<_Iterator, _Iterator> std::operator<=>(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&)' (rewritten)
 1655 |     operator<=>(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_iterator.h:1655:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::move_iterator<_IteratorL>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/vector:67,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_vector.h:1910:5: note: candidate: 'template<class _Tp, class _Alloc> std::__detail::__synth3way_t<_T1> std::operator<=>(const std::vector<_Tp, _Alloc>&, const std::vector<_Tp, _Alloc>&)' (rewritten)
 1910 |     operator<=>(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:1910:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::vector<_Tp, _Alloc>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/basic_string.h:48,
                 from /usr/include/c++/11/string:55,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/string_view:549:5: note: candidate: 'template<class _CharT, class _Traits> constexpr decltype (__char_traits_cmp_cat<_Traits>(0)) std::operator<=>(std::basic_string_view<_CharT, _Traits>, std::basic_string_view<_CharT, _Traits>)' (rewritten)
  549 |     operator<=>(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/11/string_view:549:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/string:55,
                 from /usr/include/c++/11/bits/locale_classes.h:40,
                 from /usr/include/c++/11/bits/ios_base.h:41,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/basic_string.h:6262:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> decltype (__char_traits_cmp_cat<_Traits>(0)) std::operator<=>(const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&, const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&)' (rewritten)
 6262 |     operator<=>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/11/bits/basic_string.h:6262:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/tuple:39,
                 from /usr/include/c++/11/functional:54,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/array:282:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> constexpr std::__detail::__synth3way_t<_T1> std::operator<=>(const std::array<_Tp, _Nm>&, const std::array<_Tp, _Nm>&)' (rewritten)
  282 |     operator<=>(const array<_Tp, _Nm>& __a, const array<_Tp, _Nm>& __b)
      |     ^~~~~~~~
/usr/include/c++/11/array:282:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::array<_Tp, _Nm>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/deque:67,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:68,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/stl_deque.h:2265:5: note: candidate: 'template<class _Tp, class _Alloc> std::__detail::__synth3way_t<_T1> std::operator<=>(const std::deque<_Tp, _Alloc>&, const std::deque<_Tp, _Alloc>&)' (rewritten)
 2265 |     operator<=>(const deque<_Tp, _Alloc>& __x, const deque<_Tp, _Alloc>& __y)
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_deque.h:2265:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::deque<_Tp, _Alloc>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/list:63,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:79,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/stl_list.h:2065:5: note: candidate: 'template<class _Tp, class _Alloc> std::__detail::__synth3way_t<_T1> std::operator<=>(const std::__cxx11::list<_Tp, _Alloc>&, const std::__cxx11::list<_Tp, _Alloc>&)' (rewritten)
 2065 |     operator<=>(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_list.h:2065:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::__cxx11::list<_Tp, _Alloc>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/map:61,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:81,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/stl_map.h:1484:5: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> std::__detail::__synth3way_t<std::pair<const _Key, _Tp> > std::operator<=>(const std::map<_Key, _Tp, _Compare, _Allocator>&, const std::map<_Key, _Tp, _Compare, _Allocator>&)' (rewritten)
 1484 |     operator<=>(const map<_Key, _Tp, _Compare, _Alloc>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_map.h:1484:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::map<_Key, _Tp, _Compare, _Allocator>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/map:62,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:81,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/stl_multimap.h:1149:5: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> std::__detail::__synth3way_t<std::pair<const _Key, _Tp> > std::operator<=>(const std::multimap<_Key, _Tp, _Compare, _Allocator>&, const std::multimap<_Key, _Tp, _Compare, _Allocator>&)' (rewritten)
 1149 |     operator<=>(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_multimap.h:1149:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::multimap<_Key, _Tp, _Compare, _Allocator>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/queue:64,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:86,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/stl_queue.h:392:5: note: candidate: 'template<class _Tp, class _Seq>  requires  three_way_comparable<_Seq, std::partial_ordering> std::compare_three_way_result_t<_Seq> std::operator<=>(const std::queue<_Tp, _Seq>&, const std::queue<_Tp, _Seq>&)' (rewritten)
  392 |     operator<=>(const queue<_Tp, _Seq>& __x, const queue<_Tp, _Seq>& __y)
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_queue.h:392:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::queue<_Tp, _Seq>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/set:61,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:87,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/stl_set.h:1006:5: note: candidate: 'template<class _Key, class _Compare, class _Alloc> std::__detail::__synth3way_t<_T1> std::operator<=>(const std::set<_Key, _Compare, _Allocator>&, const std::set<_Key, _Compare, _Allocator>&)' (rewritten)
 1006 |     operator<=>(const set<_Key, _Compare, _Alloc>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_set.h:1006:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::set<_Key, _Compare, _Allocator>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/set:62,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:87,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/stl_multiset.h:992:5: note: candidate: 'template<class _Key, class _Compare, class _Alloc> std::__detail::__synth3way_t<_T1> std::operator<=>(const std::multiset<_Key, _Compare, _Allocator>&, const std::multiset<_Key, _Compare, _Allocator>&)' (rewritten)
  992 |     operator<=>(const multiset<_Key, _Compare, _Alloc>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_multiset.h:992:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::multiset<_Key, _Compare, _Allocator>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/stack:61,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:89,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/stl_stack.h:367:5: note: candidate: 'template<class _Tp, class _Seq>  requires  three_way_comparable<_Seq, std::partial_ordering> std::compare_three_way_result_t<_Seq> std::operator<=>(const std::stack<_Tp, _Seq>&, const std::stack<_Tp, _Seq>&)' (rewritten)
  367 |     operator<=>(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_stack.h:367:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::stack<_Tp, _Seq>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/forward_list:38,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:104,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/forward_list.h:1446:5: note: candidate: 'template<class _Tp, class _Alloc> std::__detail::__synth3way_t<_T1> std::operator<=>(const std::forward_list<_Tp, _Alloc>&, const std::forward_list<_Tp, _Alloc>&)' (rewritten)
 1446 |     operator<=>(const forward_list<_Tp, _Alloc>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/forward_list.h:1446:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::forward_list<_Tp, _Alloc>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:133,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/variant:1246:5: note: candidate: 'template<class ... _Types>  requires (three_way_comparable<_Types, std::partial_ordering> && ...) constexpr std::common_comparison_category_t<typename std::__detail::__cmp3way_res_impl<_Types, _Types>::type ...> std::operator<=>(const std::variant<_Types ...>&, const std::variant<_Types ...>&)' (rewritten)
 1246 |     operator<=>(const variant<_Types...>& __v, const variant<_Types...>& __w)
      |     ^~~~~~~~
/usr/include/c++/11/variant:1246:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::variant<_Types ...>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:142,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/coroutine:144:3: note: candidate: 'constexpr std::strong_ordering std::__n4861::operator<=>(std::__n4861::coroutine_handle<void>, std::__n4861::coroutine_handle<void>)' (rewritten)
  144 |   operator<=>(coroutine_handle<> __a, coroutine_handle<> __b) noexcept
      |   ^~~~~~~~
/usr/include/c++/11/coroutine:144:34: note:   no known conversion for argument 1 from 'std::pair<int, int>' to 'std::__n4861::coroutine_handle<void>'
  144 |   operator<=>(coroutine_handle<> __a, coroutine_handle<> __b) noexcept
      |               ~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/11/bits/ios_base.h:46,
                 from /usr/include/c++/11/ios:42,
                 from /usr/include/c++/11/istream:38,
                 from /usr/include/c++/11/sstream:38,
                 from /usr/include/c++/11/complex:45,
                 from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/system_error:261:3: note: candidate: 'std::strong_ordering std::operator<=>(const std::error_code&, const std::error_code&)' (rewritten)
  261 |   operator<=>(const error_code& __lhs, const error_code& __rhs) noexcept
      |   ^~~~~~~~
/usr/include/c++/11/system_error:261:33: note:   no known conversion for argument 1 from 'std::pair<int, int>' to 'const std::error_code&'
  261 |   operator<=>(const error_code& __lhs, const error_code& __rhs) noexcept
      |               ~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/11/system_error:387:3: note: candidate: 'std::strong_ordering std::operator<=>(const std::error_condition&, const std::error_condition&)' (rewritten)
  387 |   operator<=>(const error_condition& __lhs,
      |   ^~~~~~~~
/usr/include/c++/11/system_error:387:38: note:   no known conversion for argument 1 from 'std::pair<int, int>' to 'const std::error_condition&'
  387 |   operator<=>(const error_condition& __lhs,
      |               ~~~~~~~~~~~~~~~~~~~~~~~^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:113,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/thread:62:3: note: candidate: 'std::strong_ordering std::operator<=>(std::thread::id, std::thread::id)' (rewritten)
   62 |   operator<=>(thread::id __x, thread::id __y) noexcept
      |   ^~~~~~~~
/usr/include/c++/11/thread:62:26: note:   no known conversion for argument 1 from 'std::pair<int, int>' to 'std::thread::id'
   62 |   operator<=>(thread::id __x, thread::id __y) noexcept
      |               ~~~~~~~~~~~^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:133,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/variant:1269:3: note: candidate: 'constexpr std::strong_ordering std::operator<=>(std::monostate, std::monostate)' (rewritten)
 1269 |   operator<=>(monostate, monostate) noexcept { return strong_ordering::equal; }
      |   ^~~~~~~~
/usr/include/c++/11/variant:1269:15: note:   no known conversion for argument 1 from 'std::pair<int, int>' to 'std::monostate'
 1269 |   operator<=>(monostate, monostate) noexcept { return strong_ordering::equal; }
      |               ^~~~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:67,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_iterator.h:509:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const std::reverse_iterator<_IteratorL>&, const std::reverse_iterator<_IteratorR>&) requires requires{{std::operator<::__x->base() > std::operator<::__y->base()} -> decltype(auto) [requires std::convertible_to<<placeholder>, bool>];}'
  509 |     operator<(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_iterator.h:509:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::reverse_iterator<_IteratorL>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:67,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/stl_iterator.h:1609:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&) requires requires{{std::operator<::__x->base() < std::operator<::__y->base()} -> decltype(auto) [requires std::convertible_to<<placeholder>, bool>];}'
 1609 |     operator<(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/stl_iterator.h:1609:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::move_iterator<_IteratorL>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/locale_conv.h:41,
                 from /usr/include/c++/11/locale:43,
                 from /usr/include/c++/11/iomanip:43,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/unique_ptr.h:795:5: note: candidate: 'template<class _Tp, class _Dp, class _Up, class _Ep> bool std::operator<(const std::unique_ptr<_Tp, _Dp>&, const std::unique_ptr<_Up, _Ep>&)'
  795 |     operator<(const unique_ptr<_Tp, _Dp>& __x,
      |     ^~~~~~~~
/usr/include/c++/11/bits/unique_ptr.h:795:5: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
                 from /usr/include/c++/11/vector:60,
                 from bubblesort2.h:1,
                 from bubblesort2.cpp:1:
/usr/include/c++/11/bits/predefined_ops.h:69:22: note:   'std::pair<int, int>' is not derived from 'const std::unique_ptr<_Tp, _Dp>'
   69 |       { return *__it < __val; }
      |                ~~~~~~^~~~~~~
In file included from /usr/include/c++/11/bits/locale_conv.h:41,
                 from /usr/include/c++/11/locale:43,
                 from /usr/include/c++/11/iomanip:43,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from bubblesort2.cpp:2:
/usr/include/c++/11/bits/unique_ptr.h:807:5: note: candidate: 'template<class _Tp, class _