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View Compilation Error

0_0_38694308_26397.cpp:15:5: error: stray '@' in program
   15 | ICPC@China
      |     ^
0_0_38694308_26397.cpp:3:1: error: 'Online' does not name a type; did you mean 'inline'?
    3 | Online Judge    Online Exercise Online Teaching Online Contests Exercise Author
      | ^~~~~~
      | inline
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_algobase.h:62,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/algorithm:60,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:51,
                 from 0_0_38694308_26397.cpp:27:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ext/type_traits.h:164:35: error: 'constexpr const bool __gnu_cxx::__is_null_pointer' redeclared as different kind of entity
  164 |   __is_null_pointer(std::nullptr_t)
      |                                   ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ext/type_traits.h:159:5: note: previous declaration 'template<class _Type> constexpr bool __gnu_cxx::__is_null_pointer(_Type)'
  159 |     __is_null_pointer(_Type)
      |     ^~~~~~~~~~~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ext/type_traits.h:164:26: error: 'nullptr_t' is not a member of 'std'
  164 |   __is_null_pointer(std::nullptr_t)
      |                          ^~~~~~~~~
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_pair.h:60,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_algobase.h:64:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:510:26: error: 'std::size_t' has not been declared
  510 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:511:25: error: '_Size' was not declared in this scope; did you mean '_msize'?
  511 |     struct is_array<_Tp[_Size]>
      |                         ^~~~~
      |                         _msize
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:511:31: error: template argument 1 is invalid
  511 |     struct is_array<_Tp[_Size]>
      |                               ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:617:33: error: 'nullptr_t' is not a member of 'std'
  617 |     struct is_null_pointer<std::nullptr_t>
      |                                 ^~~~~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:617:42: error: template argument 1 is invalid
  617 |     struct is_null_pointer<std::nullptr_t>
      |                                          ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:621:48: error: template argument 1 is invalid
  621 |     struct is_null_pointer<const std::nullptr_t>
      |                                                ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:625:51: error: template argument 1 is invalid
  625 |     struct is_null_pointer<volatile std::nullptr_t>
      |                                                   ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:629:57: error: template argument 1 is invalid
  629 |     struct is_null_pointer<const volatile std::nullptr_t>
      |                                                         ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1348:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1348 |     : public integral_constant<std::size_t, alignof(_Tp)>
      |                                     ^~~~~~
In file included from gcc-13.1.0/x86_64-w64-mingw32/include/crtdefs.h:10,
                 from gcc-13.1.0/x86_64-w64-mingw32/include/assert.h:15,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/cassert:44,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:33:
gcc-13.1.0/x86_64-w64-mingw32/include/corecrt.h:35:44: note: 'size_t' declared here
   35 | __MINGW_EXTENSION typedef unsigned __int64 size_t;
      |                                            ^~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1348:57: error: template argument 1 is invalid
 1348 |     : public integral_constant<std::size_t, alignof(_Tp)>
      |                                                         ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1357:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1357 |     : public integral_constant<std::size_t, 0> { };
      |                                     ^~~~~~
gcc-13.1.0/x86_64-w64-mingw32/include/corecrt.h:35:44: note: 'size_t' declared here
   35 | __MINGW_EXTENSION typedef unsigned __int64 size_t;
      |                                            ^~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1357:46: error: template argument 1 is invalid
 1357 |     : public integral_constant<std::size_t, 0> { };
      |                                              ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1359:26: error: 'std::size_t' has not been declared
 1359 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1360:21: error: '_Size' was not declared in this scope; did you mean '_msize'?
 1360 |     struct rank<_Tp[_Size]>
      |                     ^~~~~
      |                     _msize
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1360:27: error: template argument 1 is invalid
 1360 |     struct rank<_Tp[_Size]>
      |                           ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1361:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1361 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
gcc-13.1.0/x86_64-w64-mingw32/include/corecrt.h:35:44: note: 'size_t' declared here
   35 | __MINGW_EXTENSION typedef unsigned __int64 size_t;
      |                                            ^~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1361:65: error: template argument 1 is invalid
 1361 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                                                 ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1365:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
 1365 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
gcc-13.1.0/x86_64-w64-mingw32/include/corecrt.h:35:44: note: 'size_t' declared here
   35 | __MINGW_EXTENSION typedef unsigned __int64 size_t;
      |                                            ^~~~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1365:65: error: template argument 1 is invalid
 1365 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                                                 ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1993:26: error: 'std::size_t' has not been declared
 1993 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1994:30: error: '_Size' was not declared in this scope; did you mean '_msize'?
 1994 |     struct remove_extent<_Tp[_Size]>
      |                              ^~~~~
      |                              _msize
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:1994:36: error: template argument 1 is invalid
 1994 |     struct remove_extent<_Tp[_Size]>
      |                                    ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:2006:26: error: 'std::size_t' has not been declared
 2006 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:2007:35: error: '_Size' was not declared in this scope; did you mean '_msize'?
 2007 |     struct remove_all_extents<_Tp[_Size]>
      |                                   ^~~~~
      |                                   _msize
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:2007:41: error: template argument 1 is invalid
 2007 |     struct remove_all_extents<_Tp[_Size]>
      |                                         ^
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:2072:12: error: 'std::size_t' has not been declared
 2072 |   template<std::size_t _Len>
      |            ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:2077:30: error: '_Len' was not declared in this scope
 2077 |         unsigned char __data[_Len];
      |                              ^~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:2095:12: error: 'std::size_t' has not been declared
 2095 |   template<std::size_t _Len, std::size_t _Align =
      |            ^~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/type_traits:2095:30: error: 'std::size_t' has not been declared
 2095 |   template<std:


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