Submission #1199065

#TimeUsernameProblemLanguageResultExecution timeMemory
1199065wpdmd76Unscrambling a Messy Bug (IOI16_messy)C++20
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; #include "messy.h" vector<int> restore_permutation(int n, int w, int r) { vector<int> ret(n); string s(n, "0"); for(int i = n - 1; i >= 1; i--){ s[i] = "1"; add_element(s); } compile_set(); string res(n, "0"); int cnt = n - 1; for(int j = 0; j < n; j++){ int ix = -1; for(int i = 0; i < n; i++){ if(res[i] = "1") continue; res[i] = "1"; if(check_element(res)){ ix = i; ret[ix] = cnt; cnt--; } res[i] = "0"; } res[ix] = "1"; } return ret; }

Compilation message (stderr)

messy.cpp: In function 'std::vector<int> restore_permutation(int, int, int)':
messy.cpp:7:20: error: no matching function for call to 'std::__cxx11::basic_string<char>::basic_string(int&, const char [2])'
    7 |     string s(n, "0");
      |                    ^
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:664:9: note: candidate: 'template<class _Tp, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Tp&, const _Alloc&) [with _Tp = _Tp; <template-parameter-2-2> = <template-parameter-1-2>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  664 |         basic_string(const _Tp& __t, const _Alloc& __a = _Alloc())
      |         ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:664:9: note:   template argument deduction/substitution failed:
In file included from /usr/include/c++/11/bits/move.h:57,
                 from /usr/include/c++/11/bits/stl_pair.h:59,
                 from /usr/include/c++/11/bits/stl_algobase.h:64,
                 from /usr/include/c++/11/bits/specfun.h:45,
                 from /usr/include/c++/11/cmath:1935,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41,
                 from messy.cpp:1:
/usr/include/c++/11/type_traits: In substitution of 'template<bool _Cond, class _Tp> using enable_if_t = typename std::enable_if::type [with bool _Cond = false; _Tp = void]':
/usr/include/c++/11/bits/basic_string.h:125:8:   required by substitution of 'template<class _CharT, class _Traits, class _Alloc> template<class _Tp, class _Res> using _If_sv = std::enable_if_t<std::__and_<std::is_convertible<const _Tp&, std::basic_string_view<_CharT, _Traits> >, std::__not_<std::is_convertible<const _Tp*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>*> >, std::__not_<std::is_convertible<const _Tp&, const _CharT*> > >::value, _Res> [with _Tp = int; _Res = void; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
/usr/include/c++/11/bits/basic_string.h:662:30:   required from here
/usr/include/c++/11/type_traits:2579:11: error: no type named 'type' in 'struct std::enable_if<false, void>'
 2579 |     using enable_if_t = typename enable_if<_Cond, _Tp>::type;
      |           ^~~~~~~~~~~
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:653:9: note: candidate: 'template<class _Tp, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Tp&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _Tp = _Tp; <template-parameter-2-2> = <template-parameter-1-2>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  653 |         basic_string(const _Tp& __t, size_type __pos, size_type __n,
      |         ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:653:9: note:   template argument deduction/substitution failed:
messy.cpp:7:20: note:   candidate expects 4 arguments, 2 provided
    7 |     string s(n, "0");
      |                    ^
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:638:9: note: candidate: 'template<class _InputIterator, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(_InputIterator, _InputIterator, const _Alloc&) [with _InputIterator = _InputIterator; <template-parameter-2-2> = <template-parameter-1-2>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  638 |         basic_string(_InputIterator __beg, _InputIterator __end,
      |         ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:638:9: note:   template argument deduction/substitution failed:
messy.cpp:7:20: note:   deduced conflicting types for parameter '_InputIterator' ('int' and 'const char*')
    7 |     string s(n, "0");
      |                    ^
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:553:7: note: candidate: 'template<class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, _CharT, const _Alloc&) [with <template-parameter-2-1> = <template-parameter-1-1>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  553 |       basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:553:7: note:   template argument deduction/substitution failed:
messy.cpp:7:17: note:   cannot convert '"0"' (type 'const char [2]') to type 'char'
    7 |     string s(n, "0");
      |                 ^~~
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:533:7: note: candidate: 'template<class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with <template-parameter-2-1> = <template-parameter-1-1>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  533 |       basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:533:7: note:   template argument deduction/substitution failed:
messy.cpp:7:14: note:   cannot convert 'n' (type 'int') to type 'const char*'
    7 |     string s(n, "0");
      |              ^
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:600:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  600 |       basic_string(basic_string&& __str, const _Alloc& __a)
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:600:35: note:   no known conversion for argument 1 from 'int' to 'std::__cxx11::basic_string<char>&&'
  600 |       basic_string(basic_string&& __str, const _Alloc& __a)
      |                    ~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/11/bits/basic_string.h:596:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  596 |       basic_string(const basic_string& __str, const _Alloc& __a)
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:596:40: note:   no known conversion for argument 1 from 'int' to 'const std::__cxx11::basic_string<char>&'
  596 |       basic_string(const basic_string& __str, const _Alloc& __a)
      |                    ~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/11/bits/basic_string.h:592:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::initializer_list<_Tp>, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  592 |       basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:592:45: note:   no known conversion for argument 1 from 'int' to 'std::initializer_list<char>'
  592 |       basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/11/bits/basic_string.h:565:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  565 |       basic_string(basic_string&& __str) noexcept
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:565:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/11/bits/basic_string.h:518:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]' (near match)
  518 |       basic_string(const _CharT* __s, size_type __n,
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:518:7: note:   conversion of argument 2 would be ill-formed:
messy.cpp:7:17: error: invalid conversion from 'const char*' to 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-fpermissive]
    7 |     string s(n, "0");
      |                 ^~~
      |                 |
      |                 const char*
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:500:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]'
  500 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:500:7: note:   candidate expects 4 arguments, 2 provided
/usr/include/c++/11/bits/basic_string.h:484:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]'
  484 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:484:7: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/11/bits/basic_string.h:469:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]'
  469 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:469:40: note:   no known conversion for argument 1 from 'int' to 'const std::__cxx11::basic_string<char>&'
  469 |       basic_string(const basic_string& __str, size_type __pos,
      |                    ~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/11/bits/basic_string.h:456:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  456 |       basic_string(const basic_string& __str)
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:456:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/11/bits/basic_string.h:448:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  448 |       basic_string(const _Alloc& __a) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:448:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/11/bits/basic_string.h:439:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string() [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  439 |       basic_string()
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:439:7: note:   candidate expects 0 arguments, 2 provided
/usr/include/c++/11/bits/basic_string.h:153:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::__sv_wrapper, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  153 |       basic_string(__sv_wrapper __svw, const _Alloc& __a)
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:153:33: note:   no known conversion for argument 1 from 'int' to 'std::__cxx11::basic_string<char>::__sv_wrapper'
  153 |       basic_string(__sv_wrapper __svw, const _Alloc& __a)
      |                    ~~~~~~~~~~~~~^~~~~
messy.cpp:9:16: error: invalid conversion from 'const char*' to '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} [-fpermissive]
    9 |         s[i] = "1";
      |                ^~~
      |                |
      |                const char*
messy.cpp:13:22: error: no matching function for call to 'std::__cxx11::basic_string<char>::basic_string(int&, const char [2])'
   13 |     string res(n, "0");
      |                      ^
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:664:9: note: candidate: 'template<class _Tp, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Tp&, const _Alloc&) [with _Tp = _Tp; <template-parameter-2-2> = <template-parameter-1-2>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  664 |         basic_string(const _Tp& __t, const _Alloc& __a = _Alloc())
      |         ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:664:9: note:   template argument deduction/substitution failed:
/usr/include/c++/11/bits/basic_string.h:653:9: note: candidate: 'template<class _Tp, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Tp&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _Tp = _Tp; <template-parameter-2-2> = <template-parameter-1-2>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  653 |         basic_string(const _Tp& __t, size_type __pos, size_type __n,
      |         ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:653:9: note:   template argument deduction/substitution failed:
messy.cpp:13:22: note:   candidate expects 4 arguments, 2 provided
   13 |     string res(n, "0");
      |                      ^
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:638:9: note: candidate: 'template<class _InputIterator, class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(_InputIterator, _InputIterator, const _Alloc&) [with _InputIterator = _InputIterator; <template-parameter-2-2> = <template-parameter-1-2>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  638 |         basic_string(_InputIterator __beg, _InputIterator __end,
      |         ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:638:9: note:   template argument deduction/substitution failed:
messy.cpp:13:22: note:   deduced conflicting types for parameter '_InputIterator' ('int' and 'const char*')
   13 |     string res(n, "0");
      |                      ^
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:553:7: note: candidate: 'template<class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, _CharT, const _Alloc&) [with <template-parameter-2-1> = <template-parameter-1-1>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  553 |       basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:553:7: note:   template argument deduction/substitution failed:
messy.cpp:13:19: note:   cannot convert '"0"' (type 'const char [2]') to type 'char'
   13 |     string res(n, "0");
      |                   ^~~
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:533:7: note: candidate: 'template<class> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with <template-parameter-2-1> = <template-parameter-1-1>; _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  533 |       basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:533:7: note:   template argument deduction/substitution failed:
messy.cpp:13:16: note:   cannot convert 'n' (type 'int') to type 'const char*'
   13 |     string res(n, "0");
      |                ^
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:600:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  600 |       basic_string(basic_string&& __str, const _Alloc& __a)
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:600:35: note:   no known conversion for argument 1 from 'int' to 'std::__cxx11::basic_string<char>&&'
  600 |       basic_string(basic_string&& __str, const _Alloc& __a)
      |                    ~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/11/bits/basic_string.h:596:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  596 |       basic_string(const basic_string& __str, const _Alloc& __a)
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:596:40: note:   no known conversion for argument 1 from 'int' to 'const std::__cxx11::basic_string<char>&'
  596 |       basic_string(const basic_string& __str, const _Alloc& __a)
      |                    ~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/11/bits/basic_string.h:592:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::initializer_list<_Tp>, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  592 |       basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:592:45: note:   no known conversion for argument 1 from 'int' to 'std::initializer_list<char>'
  592 |       basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/11/bits/basic_string.h:565:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  565 |       basic_string(basic_string&& __str) noexcept
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:565:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/11/bits/basic_string.h:518:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]' (near match)
  518 |       basic_string(const _CharT* __s, size_type __n,
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:518:7: note:   conversion of argument 2 would be ill-formed:
messy.cpp:13:19: error: invalid conversion from 'const char*' to 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-fpermissive]
   13 |     string res(n, "0");
      |                   ^~~
      |                   |
      |                   const char*
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 messy.cpp:1:
/usr/include/c++/11/bits/basic_string.h:500:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]'
  500 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:500:7: note:   candidate expects 4 arguments, 2 provided
/usr/include/c++/11/bits/basic_string.h:484:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]'
  484 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:484:7: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/11/bits/basic_string.h:469:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]'
  469 |       basic_string(const basic_string& __str, size_type __pos,
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:469:40: note:   no known conversion for argument 1 from 'int' to 'const std::__cxx11::basic_string<char>&'
  469 |       basic_string(const basic_string& __str, size_type __pos,
      |                    ~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/11/bits/basic_string.h:456:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  456 |       basic_string(const basic_string& __str)
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:456:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/11/bits/basic_string.h:448:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  448 |       basic_string(const _Alloc& __a) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:448:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/11/bits/basic_string.h:439:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string() [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  439 |       basic_string()
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:439:7: note:   candidate expects 0 arguments, 2 provided
/usr/include/c++/11/bits/basic_string.h:153:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::__sv_wrapper, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  153 |       basic_string(__sv_wrapper __svw, const _Alloc& __a)
      |       ^~~~~~~~~~~~
/usr/include/c++/11/bits/basic_string.h:153:33: note:   no known conversion for argument 1 from 'int' to 'std::__cxx11::basic_string<char>::__sv_wrapper'
  153 |       basic_string(__sv_wrapper __svw, const _Alloc& __a)
      |                    ~~~~~~~~~~~~~^~~~~
messy.cpp:18:25: error: invalid conversion from 'const char*' to '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} [-fpermissive]
   18 |             if(res[i] = "1") continue;
      |                         ^~~
      |                         |
      |                         const char*
messy.cpp:19:22: error: invalid conversion from 'const char*' to '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} [-fpermissive]
   19 |             res[i] = "1";
      |                      ^~~
      |                      |
      |                      const char*
messy.cpp:25:22: error: invalid conversion from 'const char*' to '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} [-fpermissive]
   25 |             res[i] = "0";
      |                      ^~~
      |                      |
      |                      const char*
messy.cpp:27:19: error: invalid conversion from 'const char*' to '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} [-fpermissive]
   27 |         res[ix] = "1";
      |                   ^~~
      |                   |
      |                   const char*
messy.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
messy_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~