提出 e93e8c72-d831-498d-a67f-fba3c2b5d290

コード

#include <bits/stdc++.h>
using namespace std;

int main()
{
    vector<int> A;
    int Q,X,T;
    cin<<Q;
    for(int i=0;i<Q;i++){
        cin>>T;
        if(T==1)cin>>X;
        if(T==1){
           S.end() = X; 
        }
        else if(T==2){
            cout<<S.at(0)<<endl;
            S.erase(S.at(0));
        }
        else if(T==3){
            cout<<S.size()<<endl;
        }
    }
}

結果

問題	点数	言語	結果	実行時間	メモリ
E - Q	0	C++	WJ	0 ms	0 KiB

コンパイルエラー

Main.cpp: In function 'int main()':
Main.cpp:8:8: error: no match for 'operator<<' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'int')
    8 |     cin<<Q;
      |     ~~~^~~
      |     |    |
      |     |    int
      |     std::istream {aka std::basic_istream<char>}
Main.cpp:8:8: note: candidate: 'operator<<(int, int)' (built-in)
    8 |     cin<<Q;
      |     ~~~^~~
Main.cpp:8:8: note:   no known conversion for argument 1 from 'std::istream' {aka 'std::basic_istream<char>'} to 'int'
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:227,
                 from Main.cpp:1:
/usr/include/c++/13/stacktrace:736:3: note: candidate: 'std::ostream& std::operator<<(ostream&, const stacktrace_entry&)'
  736 |   operator<<(ostream& __os, const stacktrace_entry& __f)
      |   ^~~~~~~~
/usr/include/c++/13/stacktrace:736:23: note:   no known conversion for argument 1 from 'std::istream' {aka 'std::basic_istream<char>'} to 'std::ostream&' {aka 'std::basic_ostream<char>&'}
  736 |   operator<<(ostream& __os, const stacktrace_entry& __f)
      |              ~~~~~~~~~^~~~
In file included from /usr/include/c++/13/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:181:
/usr/include/c++/13/bits/regex.h:1715:5: note: candidate: 'template<class _Ch_type, class _Ch_traits, class _Bi_iter> std::basic_ostream<_CharT, _Traits>& std::__cxx11::operator<<(std::basic_ostream<_CharT, _Traits>&, const sub_match<_Bi_iter>&)'
 1715 |     operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/regex.h:1715:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:41:
/usr/include/c++/13/cstddef:124:5: note: candidate: 'template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator<<(byte, _IntegerType)'
  124 |     operator<<(byte __b, _IntegerType __shift) noexcept
      |     ^~~~~~~~
/usr/include/c++/13/cstddef:124:5: note:   template argument deduction/substitution failed:
Main.cpp:8:5: note:   cannot convert 'std::cin' (type 'std::istream' {aka 'std::basic_istream<char>'}) to type 'std::byte'
    8 |     cin<<Q;
      |     ^~~
In file included from /usr/include/c++/13/bits/basic_string.h:47,
                 from /usr/include/c++/13/string:54,
                 from /usr/include/c++/13/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:52:
/usr/include/c++/13/string_view:761:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, basic_string_view<_CharT, _Traits>)'
  761 |     operator<<(basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/string_view:761:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/basic_string.h:4032:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 4032 |     operator<<(basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:4032:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bitset:1683:5: note: candidate: 'template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const bitset<_Nb>&)'
 1683 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bitset:1683:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/c++/13/bits/ios_base.h:46,
                 from /usr/include/c++/13/streambuf:43,
                 from /usr/include/c++/13/bits/streambuf_iterator.h:35,
                 from /usr/include/c++/13/iterator:66,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:54:
/usr/include/c++/13/system_error:339:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const error_code&)'
  339 |     operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
      |     ^~~~~~~~
/usr/include/c++/13/system_error:339:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/c++/13/bits/unique_ptr.h:42,
                 from /usr/include/c++/13/memory:78,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:56:
/usr/include/c++/13/ostream:554:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _CharT)'
  554 |     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:554:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:564:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, char)'
  564 |     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:564:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:570:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, char)'
  570 |     operator<<(basic_ostream<char, _Traits>& __out, char __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:570:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:581:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, signed char)'
  581 |     operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:581:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:586:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, unsigned char)'
  586 |     operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:586:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:595:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, wchar_t)' (deleted)
  595 |     operator<<(basic_ostream<char, _Traits>&, wchar_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:595:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:600:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, char8_t)' (deleted)
  600 |     operator<<(basic_ostream<char, _Traits>&, char8_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:600:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:605:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, char16_t)' (deleted)
  605 |     operator<<(basic_ostream<char, _Traits>&, char16_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:605:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:609:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, char32_t)' (deleted)
  609 |     operator<<(basic_ostream<char, _Traits>&, char32_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:609:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:615:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(basic_ostream<wchar_t, _Traits>&, char8_t)' (deleted)
  615 |     operator<<(basic_ostream<wchar_t, _Traits>&, char8_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:615:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<wchar_t, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:620:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(basic_ostream<wchar_t, _Traits>&, char16_t)' (deleted)
  620 |     operator<<(basic_ostream<wchar_t, _Traits>&, char16_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:620:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<wchar_t, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:624:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(basic_ostream<wchar_t, _Traits>&, char32_t)' (deleted)
  624 |     operator<<(basic_ostream<wchar_t, _Traits>&, char32_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:624:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<wchar_t, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:645:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const _CharT*)'
  645 |     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:645:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/c++/13/ostream:880:
/usr/include/c++/13/bits/ostream.tcc:307:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const char*)'
  307 |     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/bits/ostream.tcc:307:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:662:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const char*)'
  662 |     operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:662:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:675:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const signed char*)'
  675 |     operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:675:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:680:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const unsigned char*)'
  680 |     operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:680:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:689:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const wchar_t*)' (deleted)
  689 |     operator<<(basic_ostream<char, _Traits>&, const wchar_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:689:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:694:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const char8_t*)' (deleted)
  694 |     operator<<(basic_ostream<char, _Traits>&, const char8_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:694:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:699:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const char16_t*)' (deleted)
  699 |     operator<<(basic_ostream<char, _Traits>&, const char16_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:699:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:703:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const char32_t*)' (deleted)
  703 |     operator<<(basic_ostream<char, _Traits>&, const char32_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:703:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:709:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(basic_ostream<wchar_t, _Traits>&, const char8_t*)' (deleted)
  709 |     operator<<(basic_ostream<wchar_t, _Traits>&, const char8_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:709:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<wchar_t, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:714:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(basic_ostream<wchar_t, _Traits>&, const char16_t*)' (deleted)
  714 |     operator<<(basic_ostream<wchar_t, _Traits>&, const char16_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:714:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<wchar_t, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:718:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(basic_ostream<wchar_t, _Traits>&, const char32_t*)' (deleted)
  718 |     operator<<(basic_ostream<wchar_t, _Traits>&, const char32_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/13/ostream:718:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<wchar_t, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/ostream:801:5: note: candidate: 'template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&)'
  801 |     operator<<(_Ostream&& __os, const _Tp& __x)
      |     ^~~~~~~~
/usr/include/c++/13/ostream:801:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/ostream: In substitution of 'template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_istream<char>&; _Tp = int]':
Main.cpp:8:10:   required from here
/usr/include/c++/13/ostream:801:5: error: template constraint failure for 'template<class _Os, class _Tp>  requires (__derived_from_ios_base<_Os>) && requires(_Os& __os, const _Tp& __t) {__os << __t;} using std::__rvalue_stream_insertion_t = _Os&&'
/usr/include/c++/13/ostream:801:5: note: constraints not satisfied
/usr/include/c++/13/ostream: In substitution of 'template<class _Os, class _Tp>  requires (__derived_from_ios_base<_Os>) && requires(_Os& __os, const _Tp& __t) {__os << __t;} using std::__rvalue_stream_insertion_t = _Os&& [with _Os = std::basic_istream<char>&; _Tp = int]':
/usr/include/c++/13/ostream:801:5:   required by substitution of 'template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_istream<char>&; _Tp = int]'
Main.cpp:8:10:   required from here
/usr/include/c++/13/ostream:768:13:   required for the satisfaction of '__derived_from_ios_base<_Os>' [with _Os = std::basic_istream<char, std::char_traits<char> >&]
/usr/include/c++/13/ostream:768:39: note: the expression 'is_class_v<_Tp> [with _Tp = std::basic_istream<char, std::char_traits<char> >&]' evaluated to 'false'
  768 |     concept __derived_from_ios_base = is_class_v<_Tp>
      |                                       ^~~~~~~~~~~~~~~
/usr/include/c++/13/bits/unique_ptr.h:1142:5: note: candidate: 'template<class _CharT, class _Traits, class _Tp, class _Dp> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const unique_ptr<_Up, _Ep>&) requires requires{std::operator<<::__os << std::operator<<::__p->get();}'
 1142 |     operator<<(basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/unique_ptr.h:1142:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/c++/13/memory:80:
/usr/include/c++/13/bits/shared_ptr.h:70:5: note: candidate: 'template<class _Ch, class _Tr, class _Tp, __gnu_cxx::_Lock_policy _Lp> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __shared_ptr<_Tp, _Lp>&)'
   70 |     operator<<(std::basic_ostream<_Ch, _Tr>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/shared_ptr.h:70:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/c++/13/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:127:
/usr/include/c++/13/complex:558:5: note: candidate: 'template<class _Tp, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const complex<_Tp>&)'
  558 |     operator<<(basic_ostream<_CharT, _Traits>& __os, const complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/13/complex:558:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:143:
/usr/include/c++/13/iomanip:81:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Resetiosflags)'
   81 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
      |     ^~~~~~~~
/usr/include/c++/13/iomanip:81:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/iomanip:111:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setiosflags)'
  111 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
      |     ^~~~~~~~
/usr/include/c++/13/iomanip:111:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/iomanip:145:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setbase)'
  145 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
      |     ^~~~~~~~
/usr/include/c++/13/iomanip:145:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/iomanip:180:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setfill<_CharT>)'
  180 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
      |     ^~~~~~~~
/usr/include/c++/13/iomanip:180:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/iomanip:210:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setprecision)'
  210 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
      |     ^~~~~~~~
/usr/include/c++/13/iomanip:210:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/iomanip:240:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setw)'
  240 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
      |     ^~~~~~~~
/usr/include/c++/13/iomanip:240:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/iomanip:313:5: note: candidate: 'template<class _CharT, class _Traits, class _MoneyT> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Put_money<_MoneyT>)'
  313 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
      |     ^~~~~~~~
/usr/include/c++/13/iomanip:313:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/iomanip:365:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Put_time<_CharT>)'
  365 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f)
      |     ^~~~~~~~
/usr/include/c++/13/iomanip:365:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/c++/13/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:166:
/usr/include/c++/13/bits/valarray_after.h:413:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  413 |     _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:413:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/valarray_after.h:413:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  413 |     _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:413:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/valarray_after.h:413:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  413 |     _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:413:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/valarray_after.h:413:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  413 |     _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:413:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/valarray_after.h:413:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  413 |     _DEFINE_EXPR_BINARY_OPERATOR(<<, struct std::__shift_left)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:413:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/valarray:1204:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const valarray<_Tp>&, const valarray<_Tp>&)'
 1204 | _DEFINE_BINARY_OPERATOR(<<, __shift_left)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/valarray:1204:1: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::valarray<_Tp>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/valarray:1204:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
 1204 | _DEFINE_BINARY_OPERATOR(<<, __shift_left)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/valarray:1204:1: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::valarray<_Tp>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/valarray:1204:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_left, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
 1204 | _DEFINE_BINARY_OPERATOR(<<, __shift_left)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/valarray:1204:1: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   mismatched types 'const std::valarray<_Tp>' and 'int'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/c++/13/random:51,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:179:
/usr/include/c++/13/bits/random.h:1341:5: note: candidate: 'template<class _RandomNumberEngine, long unsigned int __w, class _UIntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const independent_bits_engine<_RandomNumberEngine, __w, _UIntType>&)'
 1341 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.h:1341:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/c++/13/random:53:
/usr/include/c++/13/bits/random.tcc:910:5: note: candidate: 'template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const uniform_int_distribution<_IntType>&)'
  910 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:910:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:968:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const uniform_real_distribution<_RealType>&)'
  968 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:968:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2145:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const cauchy_distribution<_RealType>&)'
 2145 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2145:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:1029:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const bernoulli_distribution&)'
 1029 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:1029:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:1110:5: note: candidate: 'template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const geometric_distribution<_IntType>&)'
 1110 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:1110:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:1762:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const exponential_distribution<_RealType>&)'
 1762 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:1762:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2539:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const weibull_distribution<_RealType>&)'
 2539 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2539:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2613:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const extreme_value_distribution<_RealType>&)'
 2613 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2613:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:156:5: note: candidate: 'template<class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const linear_congruential_engine<_UIntType, __a, __c, __m>&)'
  156 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:156:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:477:5: note: candidate: 'template<class _UIntType1, long unsigned int __w1, long unsigned int __n1, long unsigned int __m1, long unsigned int __r1, _UIntType1 __a1, long unsigned int __u1, _UIntType1 __d1, long unsigned int __s1, _UIntType1 __b1, long unsigned int __t1, _UIntType1 __c1, long unsigned int __l1, _UIntType1 __f1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const mersenne_twister_engine<_UIntType1, __w1, __n1, __m1, __r1, __a1, __u1, __d1, __s1, __b1, __t1, __c1, __l1, __f1>&)'
  477 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:477:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:635:5: note: candidate: 'template<class _UIntType, long unsigned int __w, long unsigned int __s, long unsigned int __r, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const subtract_with_carry_engine<_UIntType, __w, __s, __r>&)'
  635 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:635:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:704:5: note: candidate: 'template<class _RandomNumberEngine, long unsigned int __p, long unsigned int __r, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const discard_block_engine<_RandomNumberEngine, __p, __r>&)'
  704 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:704:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:866:5: note: candidate: 'template<class _RandomNumberEngine, long unsigned int __k, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const shuffle_order_engine<_RandomNumberEngine, __k>&)'
  866 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:866:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:1224:5: note: candidate: 'template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const negative_binomial_distribution<_IntType>&)'
 1224 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:1224:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:1434:5: note: candidate: 'template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const poisson_distribution<_IntType>&)'
 1434 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:1434:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:1700:5: note: candidate: 'template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const binomial_distribution<_IntType>&)'
 1700 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:1700:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:1920:5: note: candidate: 'template<class _RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const normal_distribution<_RealType>&)'
 1920 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:1920:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:1987:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const lognormal_distribution<_RealType>&)'
 1987 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:1987:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2059:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const chi_squared_distribution<_RealType>&)'
 2059 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2059:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2220:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const fisher_f_distribution<_RealType>&)'
 2220 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2220:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2294:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const student_t_distribution<_RealType>&)'
 2294 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2294:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2463:5: note: candidate: 'template<class _RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const gamma_distribution<_RealType>&)'
 2463 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2463:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2749:5: note: candidate: 'template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const discrete_distribution<_IntType>&)'
 2749 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2749:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:2971:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const piecewise_constant_distribution<_RealType>&)'
 2971 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:2971:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/bits/random.tcc:3177:5: note: candidate: 'template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const piecewise_linear_distribution<_RealType>&)'
 3177 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/13/bits/random.tcc:3177:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:184:
/usr/include/c++/13/thread:97:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, thread::id)'
   97 |     operator<<(basic_ostream<_CharT, _Traits>& __out, thread::id __id)
      |     ^~~~~~~~
/usr/include/c++/13/thread:97:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
    8 |     cin<<Q;
      |          ^
/usr/include/c++/13/stacktrace:750:5: note: candidate: 'template<class _Allocator> std::ostream& std::operator<<(ostream&, const basic_stacktrace<_Allocator>&)'
  750 |     operator<<(ostream& __os, const basic_stacktrace<_Allocator>& __st)
      |     ^~~~~~~~
/usr/include/c++/13/stacktrace:750:5: note:   template argument deduction/substitution failed:
Main.cpp:8:10: note:   mismatched types 'const std::basic_stacktrace<_Allocator>' and 'int'
    8 |     cin<<Q;
      |          ^
Main.cpp:13:12: error: 'S' was not declared in this scope
   13 |            S.end() = X;
      |            ^
Main.cpp:16:19: error: 'S' was not declared in this scope
   16 |             cout<<S.at(0)<<endl;
      |                   ^
Main.cpp:20:19: error: 'S' was not declared in this scope
   20 |             cout<<S.size()<<endl;
      |                   ^