제출 #1122540

#제출 시각아이디문제언어결과실행 시간메모리
1122540Trisanu_DasAirplane (NOI23_airplane)C++20
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; int main(){ int n, m; cin >> n >> m; vector<int> v(n); vector<vector<int >> g(n); for(auto &e:v) cin >> e; for(int i=0; i<m; i++){ int a, b; cin >> a >> b; a--; b--; g[a].push_back(b); g[b].push_back(a); } vector<int> ans(n, -1), ans2(n, -1), tm(n, -1), tm2(n, -1); priority_queue<tuple<int, int, int >> pq; pq.push({0, 0, 0}); while(pq.size()){ auto [t, h, cur]=pq.top(); pq.pop(); if(tm[cur]!=-1) continue; t=tm[cur]=-t; h=ans[cur]=-h; for(auto ch:g[cur]) pq.push({-max(v[ch], t + 1), -max(h, v[ch]), ch}); } pq.push({0, 0, n-1}); while(pq.size()){ auto [t, h, cur]=pq.top(); pq.pop(); if(tm2[cur]!=-1) continue; h=ans2[cur]=-h; t=tm2[cur]=-t; for(auto ch:g[cur]) pq.push({-max(v[ch], t + 1), -max(h, v[ch]), ch}); } int ans_ = INT_MAX; for(int i = 0; i < n; i++) ans_ = min(ans_, tm[i] + tm2[i] + abs(ans[i] - ans2[i])); cout << ans << '\n'; }

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:39:14: error: no match for 'operator<<' (operand types are 'std::ostream' {aka 'std::basic_ostream<char>'} and 'std::vector<int>')
   39 |         cout << ans << '\n';
      |         ~~~~ ^~ ~~~
      |         |       |
      |         |       std::vector<int>
      |         std::ostream {aka std::basic_ostream<char>}
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:108:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ostream_type& (*)(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  108 |       operator<<(__ostream_type& (*__pf)(__ostream_type&))
      |       ^~~~~~~~
/usr/include/c++/11/ostream:108:36: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::basic_ostream<char>::__ostream_type& (*)(std::basic_ostream<char>::__ostream_type&)' {aka 'std::basic_ostream<char>& (*)(std::basic_ostream<char>&)'}
  108 |       operator<<(__ostream_type& (*__pf)(__ostream_type&))
      |                  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/11/ostream:117:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ios_type& (*)(std::basic_ostream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>; std::basic_ostream<_CharT, _Traits>::__ios_type = std::basic_ios<char>]'
  117 |       operator<<(__ios_type& (*__pf)(__ios_type&))
      |       ^~~~~~~~
/usr/include/c++/11/ostream:117:32: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::basic_ostream<char>::__ios_type& (*)(std::basic_ostream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'}
  117 |       operator<<(__ios_type& (*__pf)(__ios_type&))
      |                  ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
/usr/include/c++/11/ostream:127:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  127 |       operator<<(ios_base& (*__pf) (ios_base&))
      |       ^~~~~~~~
/usr/include/c++/11/ostream:127:30: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::ios_base& (*)(std::ios_base&)'
  127 |       operator<<(ios_base& (*__pf) (ios_base&))
      |                  ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/11/ostream:166:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  166 |       operator<<(long __n)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:166:23: note:   no known conversion for argument 1 from 'std::vector<int>' to 'long int'
  166 |       operator<<(long __n)
      |                  ~~~~~^~~
/usr/include/c++/11/ostream:170:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  170 |       operator<<(unsigned long __n)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:170:32: note:   no known conversion for argument 1 from 'std::vector<int>' to 'long unsigned int'
  170 |       operator<<(unsigned long __n)
      |                  ~~~~~~~~~~~~~~^~~
/usr/include/c++/11/ostream:174:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  174 |       operator<<(bool __n)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:174:23: note:   no known conversion for argument 1 from 'std::vector<int>' to 'bool'
  174 |       operator<<(bool __n)
      |                  ~~~~~^~~
In file included from /usr/include/c++/11/ostream:829,
                 from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/bits/ostream.tcc:91:5: note: candidate: 'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char; _Traits = std::char_traits<char>]'
   91 |     basic_ostream<_CharT, _Traits>::
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/11/bits/ostream.tcc:92:22: note:   no known conversion for argument 1 from 'std::vector<int>' to 'short int'
   92 |     operator<<(short __n)
      |                ~~~~~~^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:181:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  181 |       operator<<(unsigned short __n)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:181:33: note:   no known conversion for argument 1 from 'std::vector<int>' to 'short unsigned int'
  181 |       operator<<(unsigned short __n)
      |                  ~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/11/ostream:829,
                 from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/bits/ostream.tcc:105:5: note: candidate: 'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char; _Traits = std::char_traits<char>]'
  105 |     basic_ostream<_CharT, _Traits>::
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/11/bits/ostream.tcc:106:20: note:   no known conversion for argument 1 from 'std::vector<int>' to 'int'
  106 |     operator<<(int __n)
      |                ~~~~^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:192:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  192 |       operator<<(unsigned int __n)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:192:31: note:   no known conversion for argument 1 from 'std::vector<int>' to 'unsigned int'
  192 |       operator<<(unsigned int __n)
      |                  ~~~~~~~~~~~~~^~~
/usr/include/c++/11/ostream:201:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  201 |       operator<<(long long __n)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:201:28: note:   no known conversion for argument 1 from 'std::vector<int>' to 'long long int'
  201 |       operator<<(long long __n)
      |                  ~~~~~~~~~~^~~
/usr/include/c++/11/ostream:205:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  205 |       operator<<(unsigned long long __n)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:205:37: note:   no known conversion for argument 1 from 'std::vector<int>' to 'long long unsigned int'
  205 |       operator<<(unsigned long long __n)
      |                  ~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/11/ostream:220:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  220 |       operator<<(double __f)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:220:25: note:   no known conversion for argument 1 from 'std::vector<int>' to 'double'
  220 |       operator<<(double __f)
      |                  ~~~~~~~^~~
/usr/include/c++/11/ostream:224:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(float) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  224 |       operator<<(float __f)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:224:24: note:   no known conversion for argument 1 from 'std::vector<int>' to 'float'
  224 |       operator<<(float __f)
      |                  ~~~~~~^~~
/usr/include/c++/11/ostream:232:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long double) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  232 |       operator<<(long double __f)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:232:30: note:   no known conversion for argument 1 from 'std::vector<int>' to 'long double'
  232 |       operator<<(long double __f)
      |                  ~~~~~~~~~~~~^~~
/usr/include/c++/11/ostream:245:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(const void*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
  245 |       operator<<(const void* __p)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:245:30: note:   no known conversion for argument 1 from 'std::vector<int>' to 'const void*'
  245 |       operator<<(const void* __p)
      |                  ~~~~~~~~~~~~^~~
/usr/include/c++/11/ostream:250:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::nullptr_t) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>; std::nullptr_t = std::nullptr_t]'
  250 |       operator<<(nullptr_t)
      |       ^~~~~~~~
/usr/include/c++/11/ostream:250:18: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::nullptr_t'
  250 |       operator<<(nullptr_t)
      |                  ^~~~~~~~~
In file included from /usr/include/c++/11/ostream:829,
                 from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/bits/ostream.tcc:119:5: note: candidate: 'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>]'
  119 |     basic_ostream<_CharT, _Traits>::
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/11/bits/ostream.tcc:120:34: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::basic_ostream<char>::__streambuf_type*' {aka 'std::basic_streambuf<char>*'}
  120 |     operator<<(__streambuf_type* __sbin)
      |                ~~~~~~~~~~~~~~~~~~^~~~~~
In file included from /usr/include/c++/11/regex:63,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:110,
                 from Main.cpp:1:
/usr/include/c++/11/bits/regex.h:1671:5: 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 std::__cxx11::sub_match<_Bi_iter>&)'
 1671 |     operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/11/bits/regex.h:1671:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'const std::__cxx11::sub_match<_Bi_iter>'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:45,
                 from Main.cpp:1:
/usr/include/c++/11/cstddef:126:5: note: candidate: 'template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator<<(std::byte, _IntegerType)'
  126 |     operator<<(byte __b, _IntegerType __shift) noexcept
      |     ^~~~~~~~
/usr/include/c++/11/cstddef:126:5: note:   template argument deduction/substitution failed:
Main.cpp:39:9: note:   cannot convert 'std::cout' (type 'std::ostream' {aka 'std::basic_ostream<char>'}) to type 'std::byte'
   39 |         cout << ans << '\n';
      |         ^~~~
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 Main.cpp:1:
/usr/include/c++/11/string_view:667:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::basic_string_view<_CharT, _Traits>)'
  667 |     operator<<(basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/11/string_view:667:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   39 |         cout << ans << '\n';
      |                 ^~~
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 Main.cpp:1:
/usr/include/c++/11/bits/basic_string.h:6531:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 6531 |     operator<<(basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/11/bits/basic_string.h:6531:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   39 |         cout << ans << '\n';
      |                 ^~~
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 Main.cpp:1:
/usr/include/c++/11/system_error:279:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)'
  279 |     operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
      |     ^~~~~~~~
/usr/include/c++/11/system_error:279:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const std::error_code&'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:513:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)'
  513 |     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:513:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   deduced conflicting types for parameter '_CharT' ('char' and 'std::vector<int>')
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:518:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)'
  518 |     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:518:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:524:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)'
  524 |     operator<<(basic_ostream<char, _Traits>& __out, char __c)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:524:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:530:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)'
  530 |     operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:530:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'signed char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:535:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)'
  535 |     operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:535:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'unsigned char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:544:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, wchar_t)' (deleted)
  544 |     operator<<(basic_ostream<char, _Traits>&, wchar_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:544:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'wchar_t'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:549:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char8_t)' (deleted)
  549 |     operator<<(basic_ostream<char, _Traits>&, char8_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:549:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'char8_t'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:554:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char16_t)' (deleted)
  554 |     operator<<(basic_ostream<char, _Traits>&, char16_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:554:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'char16_t'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:558:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char32_t)' (deleted)
  558 |     operator<<(basic_ostream<char, _Traits>&, char32_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:558:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'char32_t'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:564:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(std::basic_ostream<wchar_t, _Traits>&, char8_t)' (deleted)
  564 |     operator<<(basic_ostream<wchar_t, _Traits>&, char8_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:564:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   mismatched types 'wchar_t' and 'char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:569:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(std::basic_ostream<wchar_t, _Traits>&, char16_t)' (deleted)
  569 |     operator<<(basic_ostream<wchar_t, _Traits>&, char16_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:569:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   mismatched types 'wchar_t' and 'char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:573:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(std::basic_ostream<wchar_t, _Traits>&, char32_t)' (deleted)
  573 |     operator<<(basic_ostream<wchar_t, _Traits>&, char32_t) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:573:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   mismatched types 'wchar_t' and 'char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:594:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)'
  594 |     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:594:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   mismatched types 'const _CharT*' and 'std::vector<int>'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/ostream:829,
                 from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/bits/ostream.tcc:321:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)'
  321 |     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
      |     ^~~~~~~~
/usr/include/c++/11/bits/ostream.tcc:321:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const char*'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:611:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)'
  611 |     operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:611:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const char*'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:624:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)'
  624 |     operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:624:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const signed char*'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:629:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)'
  629 |     operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:629:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const unsigned char*'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:638:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const wchar_t*)' (deleted)
  638 |     operator<<(basic_ostream<char, _Traits>&, const wchar_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:638:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const wchar_t*'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:643:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char8_t*)' (deleted)
  643 |     operator<<(basic_ostream<char, _Traits>&, const char8_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:643:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const char8_t*'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:648:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char16_t*)' (deleted)
  648 |     operator<<(basic_ostream<char, _Traits>&, const char16_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:648:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const char16_t*'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:652:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char32_t*)' (deleted)
  652 |     operator<<(basic_ostream<char, _Traits>&, const char32_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:652:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'const char32_t*'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:658:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(std::basic_ostream<wchar_t, _Traits>&, const char8_t*)' (deleted)
  658 |     operator<<(basic_ostream<wchar_t, _Traits>&, const char8_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:658:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   mismatched types 'wchar_t' and 'char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:663:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(std::basic_ostream<wchar_t, _Traits>&, const char16_t*)' (deleted)
  663 |     operator<<(basic_ostream<wchar_t, _Traits>&, const char16_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:663:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   mismatched types 'wchar_t' and 'char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:667:5: note: candidate: 'template<class _Traits> std::basic_ostream<wchar_t, _Traits>& std::operator<<(std::basic_ostream<wchar_t, _Traits>&, const char32_t*)' (deleted)
  667 |     operator<<(basic_ostream<wchar_t, _Traits>&, const char32_t*) = delete;
      |     ^~~~~~~~
/usr/include/c++/11/ostream:667:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   mismatched types 'wchar_t' and 'char'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/istream:39,
                 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 Main.cpp:1:
/usr/include/c++/11/ostream:750:5: note: candidate: 'template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&)'
  750 |     operator<<(_Ostream&& __os, const _Tp& __x)
      |     ^~~~~~~~
/usr/include/c++/11/ostream:750:5: note:   template argument deduction/substitution failed:
/usr/include/c++/11/ostream: In substitution of 'template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_ostream<char>&; _Tp = std::vector<int>]':
Main.cpp:39:10:   required from here
/usr/include/c++/11/ostream:750:5: 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 __rvalue_stream_insertion_t = _Os&&'
/usr/include/c++/11/ostream:750:5: note: constraints not satisfied
/usr/include/c++/11/ostream: In substitution of 'template<class _Os, class _Tp>  requires (__derived_from_ios_base<_Os>) && requires(_Os& __os, const _Tp& __t) {__os << __t;} using __rvalue_stream_insertion_t = _Os&& [with _Os = std::basic_ostream<char>&; _Tp = std::vector<int>]':
/usr/include/c++/11/ostream:750:5:   required by substitution of 'template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_ostream<char>&; _Tp = std::vector<int>]'
Main.cpp:39:10:   required from here
/usr/include/c++/11/ostream:717:13:   required for the satisfaction of '__derived_from_ios_base<_Os>' [with _Os = std::basic_ostream<char, std::char_traits<char> >&]
/usr/include/c++/11/ostream:717:39: note: the expression 'is_class_v<_Tp> [with _Tp = std::basic_ostream<char, std::char_traits<char> >&]' evaluated to 'false'
  717 |     concept __derived_from_ios_base = is_class_v<_Tp>
      |                                       ^~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54,
                 from Main.cpp:1:
/usr/include/c++/11/complex:555:5: note: candidate: 'template<class _Tp, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::complex<_Tp>&)'
  555 |     operator<<(basic_ostream<_CharT, _Traits>& __os, const complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/11/complex:555:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'const std::complex<_Tp>'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:66,
                 from Main.cpp:1:
/usr/include/c++/11/bitset:1540:5: note: candidate: 'template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::bitset<_Nb>&)'
 1540 |     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/11/bitset:1540:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'const std::bitset<_Nb>'
   39 |         cout << ans << '\n';
      |                 ^~~
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 Main.cpp:1:
/usr/include/c++/11/bits/unique_ptr.h:1003:5: note: candidate: 'template<class _CharT, class _Traits, class _Tp, class _Dp> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::unique_ptr<_Up, _Ep>&) requires requires{std::operator<<::__os << std::operator<<::__p->get();}'
 1003 |     operator<<(basic_ostream<_CharT, _Traits>& __os,
      |     ^~~~~~~~
/usr/include/c++/11/bits/unique_ptr.h:1003:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'const std::unique_ptr<_Up, _Ep>'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from Main.cpp:1:
/usr/include/c++/11/iomanip:79:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Resetiosflags)'
   79 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
      |     ^~~~~~~~
/usr/include/c++/11/iomanip:79:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'std::_Resetiosflags'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from Main.cpp:1:
/usr/include/c++/11/iomanip:109:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setiosflags)'
  109 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
      |     ^~~~~~~~
/usr/include/c++/11/iomanip:109:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'std::_Setiosflags'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from Main.cpp:1:
/usr/include/c++/11/iomanip:143:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setbase)'
  143 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
      |     ^~~~~~~~
/usr/include/c++/11/iomanip:143:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'std::_Setbase'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from Main.cpp:1:
/usr/include/c++/11/iomanip:178:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setfill<_CharT>)'
  178 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
      |     ^~~~~~~~
/usr/include/c++/11/iomanip:178:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'std::_Setfill<_CharT>'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from Main.cpp:1:
/usr/include/c++/11/iomanip:208:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setprecision)'
  208 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
      |     ^~~~~~~~
/usr/include/c++/11/iomanip:208:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'std::_Setprecision'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from Main.cpp:1:
/usr/include/c++/11/iomanip:238:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setw)'
  238 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
      |     ^~~~~~~~
/usr/include/c++/11/iomanip:238:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   cannot convert 'ans' (type 'std::vector<int>') to type 'std::_Setw'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from Main.cpp:1:
/usr/include/c++/11/iomanip:311:5: note: candidate: 'template<class _CharT, class _Traits, class _MoneyT> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Put_money<_MoneyT>)'
  311 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
      |     ^~~~~~~~
/usr/include/c++/11/iomanip:311:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'std::_Put_money<_MoneyT>'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72,
                 from Main.cpp:1:
/usr/include/c++/11/iomanip:363:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Put_time<_CharT>)'
  363 |     operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f)
      |     ^~~~~~~~
/usr/include/c++/11/iomanip:363:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'std::_Put_time<_CharT>'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/memory:77,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:82,
                 from Main.cpp:1:
/usr/include/c++/11/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<<(std::basic_ostream<_CharT, _Traits>&, const std::__shared_ptr<_Tp, _Lp>&)'
   70 |     operator<<(std::basic_ostream<_Ch, _Tr>& __os,
      |     ^~~~~~~~
/usr/include/c++/11/bits/shared_ptr.h:70:5: note:   template argument deduction/substitution failed:
Main.cpp:39:17: note:   'std::vector<int>' is not derived from 'const std::__shared_ptr<_Tp, _Lp>'
   39 |         cout << ans << '\n';
      |                 ^~~
In file included from /usr/include/c++/11/valarray:603,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95,
                 from Main.cpp:1:
/usr/include/c++/11/bits/valarray_after.h:413:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__shift_lef