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            <a href="https://itcoder.hutech.edu.vn/solution/detail?id=418781">418781</a>        </b>
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                        <pre>/bin/chown: invalid user: ‘judge’
Main.cc:1:1: error: ‘Bài’ does not name a type
    1 | Bài C
      | ^~~
In file included from /usr/include/c++/11/cmath:43,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:41,
                 from Main.cc:2:
/usr/include/c++/11/ext/type_traits.h:162:35: error: ‘bool __gnu_cxx::__is_null_pointer’ redeclared as different kind of entity
  162 |   __is_null_pointer(std::nullptr_t)
      |                                   ^
/usr/include/c++/11/ext/type_traits.h:157:5: note: previous declaration ‘template bool __gnu_cxx::__is_null_pointer(_Type)’
  157 |     __is_null_pointer(_Type)
      |     ^~~~~~~~~~~~~~~~~
/usr/include/c++/11/ext/type_traits.h:162:26: error: ‘nullptr_t’ is not a member of ‘std’
  162 |   __is_null_pointer(std::nullptr_t)
      |                          ^~~~~~~~~
In file included from /usr/include/c++/11/bits/exception_ptr.h:40,
                 from /usr/include/c++/11/exception:153,
                 from /usr/include/c++/11/ios:39,
                 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.cc:2:
/usr/include/c++/11/new:126:26: error: declaration of ‘operator new’ as non-function
  126 | _GLIBCXX_NODISCARD void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                          ^~~~~~~~
/usr/include/c++/11/new:126:44: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  126 | _GLIBCXX_NODISCARD void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                                            ^~~~~~
      |                                            time_t
/usr/include/c++/11/new:127:41: error: attributes after parenthesized initializer ignored [-fpermissive]
  127 |   __attribute__((__externally_visible__));
      |                                         ^
/usr/include/c++/11/new:128:26: error: declaration of ‘operator new []’ as non-function
  128 | _GLIBCXX_NODISCARD void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                          ^~~~~~~~
/usr/include/c++/11/new:128:46: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  128 | _GLIBCXX_NODISCARD void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
      |                                              ^~~~~~
      |                                              time_t
/usr/include/c++/11/new:129:41: error: attributes after parenthesized initializer ignored [-fpermissive]
  129 |   __attribute__((__externally_visible__));
      |                                         ^
/usr/include/c++/11/new:140:26: error: declaration of ‘operator new’ as non-function
  140 | _GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&amp;) _GLIBCXX_USE_NOEXCEPT
      |                          ^~~~~~~~
/usr/include/c++/11/new:140:44: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  140 | _GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&amp;) _GLIBCXX_USE_NOEXCEPT
      |                                            ^~~~~~
      |                                            time_t
/usr/include/c++/11/new:140:52: error: expected primary-expression before ‘const’
  140 | _GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&amp;) _GLIBCXX_USE_NOEXCEPT
      |                                                    ^~~~~
/usr/include/c++/11/new:142:26: error: declaration of ‘operator new []’ as non-function
  142 | _GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&amp;) _GLIBCXX_USE_NOEXCEPT
      |                          ^~~~~~~~
/usr/include/c++/11/new:142:46: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  142 | _GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&amp;) _GLIBCXX_USE_NOEXCEPT
      |                                              ^~~~~~
      |                                              time_t
/usr/include/c++/11/new:142:54: error: expected primary-expression before ‘const’
  142 | _GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&amp;) _GLIBCXX_USE_NOEXCEPT
      |                                                      ^~~~~
/usr/include/c++/11/new:174:33: error: declaration of ‘operator new’ as non-function
  174 | _GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                 ^~~~~~~~
/usr/include/c++/11/new:174:51: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  174 | _GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                   ^~~~~~
      |                                                   time_t
/usr/include/c++/11/new:174:59: error: expected primary-expression before ‘void’
  174 | _GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                           ^~~~
/usr/include/c++/11/new:176:33: error: declaration of ‘operator new []’ as non-function
  176 | _GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                 ^~~~~~~~
/usr/include/c++/11/new:176:53: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  176 | _GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                     ^~~~~~
      |                                                     time_t
/usr/include/c++/11/new:176:61: error: expected primary-expression before ‘void’
  176 | _GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
      |                                                             ^~~~
In file included from /usr/include/c++/11/bits/move.h:57,
                 from /usr/include/c++/11/bits/exception_ptr.h:43,
                 from /usr/include/c++/11/exception:153,
                 from /usr/include/c++/11/ios:39,
                 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.cc:2:
/usr/include/c++/11/type_traits:431:31: error: ‘std::size_t’ has not been declared
  431 |   template
      |                               ^~~~~~
/usr/include/c++/11/type_traits:432:25: error: ‘_Size’ was not declared in this scope
  432 |     struct is_array&lt;_Tp[_Size]&gt;
      |                         ^~~~~
/usr/include/c++/11/type_traits:432:31: error: template argument 1 is invalid
  432 |     struct is_array&lt;_Tp[_Size]&gt;
      |                               ^
/usr/include/c++/11/type_traits:537:42: error: ‘nullptr_t’ is not a member of ‘std’; did you mean ‘nullptr_t’?
  537 |     struct __is_null_pointer_helper
      |                                          ^~~~~~~~~
In file included from /usr/include/c++/11/cstddef:50,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:45,
                 from Main.cc:2:
/usr/lib/gcc/x86_64-linux-gnu/11/include/stddef.h:433:29: note: ‘nullptr_t’ declared here
  433 |   typedef decltype(nullptr) nullptr_t;
      |                             ^~~~~~~~~
In file included from /usr/include/c++/11/bits/move.h:57,
                 from /usr/include/c++/11/bits/exception_ptr.h:43,
                 from /usr/include/c++/11/exception:153,
                 from /usr/include/c++/11/ios:39,
                 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.cc:2:
/usr/include/c++/11/type_traits:537:42: error: ‘nullptr_t’ is not a member of ‘std’; did you mean ‘nullptr_t’?
  537 |     struct __is_null_pointer_helper
      |                                          ^~~~~~~~~
In file included from /usr/include/c++/11/cstddef:50,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:45,
                 from Main.cc:2:
/usr/lib/gcc/x86_64-linux-gnu/11/include/stddef.h:433:29: note: ‘nullptr_t’ declared here
  433 |   typedef decltype(nullptr) nullptr_t;
      |                             ^~~~~~~~~
In file included from /usr/include/c++/11/bits/move.h:57,
                 from /usr/include/c++/11/bits/exception_ptr.h:43,
                 from /usr/include/c++/11/exception:153,
                 from /usr/include/c++/11/ios:39,
                 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.cc:2:
/usr/include/c++/11/type_traits:537:51: error: template argument 1 is invalid
  537 |     struct __is_null_pointer_helper
      |                                                   ^
/usr/include/c++/11/type_traits:1361:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1361 |     : public integral_constant
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1361:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1361 |     : public integral_constant
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1361:57: error: template argument 1 is invalid
 1361 |     : public integral_constant
      |                                                         ^
/usr/include/c++/11/type_traits:1361:57: note: invalid template non-type parameter
/usr/include/c++/11/type_traits:1370:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1370 |     : public integral_constant { };
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1370:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1370 |     : public integral_constant { };
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1370:46: error: template argument 1 is invalid
 1370 |     : public integral_constant { };
      |                                              ^
/usr/include/c++/11/type_traits:1370:46: note: invalid template non-type parameter
/usr/include/c++/11/type_traits:1372:31: error: ‘std::size_t’ has not been declared
 1372 |   template
      |                               ^~~~~~
/usr/include/c++/11/type_traits:1373:21: error: ‘_Size’ was not declared in this scope
 1373 |     struct rank&lt;_Tp[_Size]&gt;
      |                     ^~~~~
/usr/include/c++/11/type_traits:1373:27: error: template argument 1 is invalid
 1373 |     struct rank&lt;_Tp[_Size]&gt;
      |                           ^
/usr/include/c++/11/type_traits:1374:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1374 |     : public integral_constant::value&gt; { };
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1374:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1374 |     : public integral_constant::value&gt; { };
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1374:65: error: template argument 1 is invalid
 1374 |     : public integral_constant::value&gt; { };
      |                                                                 ^
/usr/include/c++/11/type_traits:1374:65: note: invalid template non-type parameter
/usr/include/c++/11/type_traits:1378:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1378 |     : public integral_constant::value&gt; { };
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1378:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1378 |     : public integral_constant::value&gt; { };
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1378:65: error: template argument 1 is invalid
 1378 |     : public integral_constant::value&gt; { };
      |                                                                 ^
/usr/include/c++/11/type_traits:1378:65: note: invalid template non-type parameter
/usr/include/c++/11/type_traits:1383:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1383 |     : public integral_constant { };
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1383:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1383 |     : public integral_constant { };
      |                                     ^~~~~~
      |                                     time_t
/usr/include/c++/11/type_traits:1383:46: error: template argument 1 is invalid
 1383 |     : public integral_constant { };
      |                                              ^
/usr/include/c++/11/type_traits:1383:46: note: invalid template non-type parameter
/usr/include/c++/11/type_traits:1385:47: error: ‘std::size_t’ has not been declared
 1385 |   template
      |                                               ^~~~~~
/usr/include/c++/11/type_traits:1386:23: error: ‘_Size’ was not declared in this scope
 1386 |     struct extent&lt;_Tp[_Size], _Uint&gt;
      |                       ^~~~~
/usr/include/c++/11/type_traits:1386:36: error: template argument 1 is invalid
 1386 |     struct extent&lt;_Tp[_Size], _Uint&gt;
      |                                    ^
/usr/include/c++/11/type_traits:1387:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1387 |     : public integral_constant::value&gt;
      |                                                                             ^
/usr/include/c++/11/type_traits:1389:77: note: invalid template non-type parameter
/usr/include/c++/11/type_traits:1394:37: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
 1394 |     : public integral_constant::value&gt;
      |                                                                         ^
/usr/include/c++/11/type_traits:1396:73: note: invalid template non-type parameter
/usr/include/c++/11/type_traits:1984:31: error: ‘std::size_t’ has not been declared
 1984 |   template
      |                               ^~~~~~
/usr/include/c++/11/type_traits:1985:30: error: ‘_Size’ was not declared in this scope
 1985 |     struct remove_extent&lt;_Tp[_Size]&gt;
      |                              ^~~~~
/usr/include/c++/11/type_traits:1985:36: error: template argument 1 is invalid
 1985 |     struct remove_extent&lt;_Tp[_Size]&gt;
      |                                    ^
/usr/include/c++/11/type_traits:1997:31: error: ‘std::size_t’ has not been declared
 1997 |   template
      |                               ^~~~~~
/usr/include/c++/11/type_traits:1998:35: error: ‘_Size’ was not declared in this scope
 1998 |     struct remove_all_extents&lt;_Tp[_Size]&gt;
      |                                   ^~~~~
/usr/include/c++/11/type_traits:1998:41: error: template argument 1 is invalid
 1998 |     struct remove_all_extents&lt;_Tp[_Size]&gt;
      |                                         ^
/usr/include/c++/11/type_traits:2056:17: error: ‘std::size_t’ has not been declared
 2056 |   template
      |                 ^~~~~~
/usr/include/c++/11/type_traits:2061:30: error: ‘_Len’ was not declared in this scope
 2061 |         unsigned char __data[_Len];
      |                              ^~~~
/usr/include/c++/11/type_traits:2076:17: error: ‘std::size_t’ has not been declared
 2076 |   template::__type)&gt;
      |                                                       ^~~~
/usr/include/c++/11/type_traits:2077:59: error: template argument 1 is invalid
 2077 |            __alignof__(typename __aligned_storage_msa&lt;_Len&gt;::__type)&gt;
      |                                                           ^
/usr/include/c++/11/type_traits:2082:30: error: ‘_Len’ was not declared in this scope
 2082 |         unsigned char __data[_Len];
      |                              ^~~~
/usr/include/c++/11/type_traits:2083:44: error: ‘_Align’ was not declared in this scope
 2083 |         struct __attribute__((__aligned__((_Align)))) { } __align;
      |                                            ^~~~~~
In file included from /usr/include/c++/11/ios:40,
                 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.cc:2:
/usr/include/c++/11/bits/char_traits.h:114:66: error: ‘std::size_t’ has not been declared
  114 |       compare(const char_type* __s1, const char_type* __s2, std::size_t __n);
      |                                                                  ^~~~~~
/usr/include/c++/11/bits/char_traits.h:116:40: error: ‘size_t’ in namespace ‘std’ does not name a type; did you mean ‘time_t’?
  116 |       static _GLIBCXX14_CONSTEXPR std::size_t
      |                                        ^~~~~~
      |                                        time_t
/usr/include/c++/11/bits/char_traits.h:120:39: error: ‘std::size_t’ has not been declared
  120 |       find(const char_type* __s, std::size_t __n, const char_type&amp; __a);
      |                                       ^~~~~~
/usr/include/c++/11/bits/char_traits.h:123:57: error: ‘std::size_t’ has not been declared
  123 |       move(char_type* __s1, const char_type* __s2, std::size_t __n);
      |                                                         ^~~~~~
/usr/include/c++/11/bits/char_traits.h:126:57: error: ‘std::size_t’ has not been declared
  126 |       copy(char_type* __s1, const char_type* __s2, std::size_t __n);
      |                                                         ^~~~~~
/usr/include/c++/11/bits/char_traits.h:129:35: error: ‘std::size_t’ has not been declared
  129 |       assign(char_type* __s, std::size_t __n, char_type __a);
      |                                   ^~~~~~
/usr/include/c++/11/bits/char_traits.h:155:64: error: ‘std::size_t’ has not been declared
  155 |     compare(const char_type* __s1, const char_type* __s2, std::size_t __n)
      |                                                                ^~~~~~
/usr/include/c++/11/bits/char_traits.h: In static member function ‘static int __gnu_cxx::char_traits&lt;_CharT&gt;::compare(const char_type*, const char_type*, int)’:
/usr/include/c++/11/bits/char_traits.h:157:17: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  157 |       for (std::size_t __i = 0; __i &lt; __n; ++__i)
      |                 ^~~~~~
      |                 time_t
/usr/include/c++/11/bits/char_traits.h:157:33: error: ‘__i’ was not declared in this scope; did you mean ‘__n’?
  157 |       for (std::size_t __i = 0; __i &lt; __n; ++__i)
      |                                 ^~~
      |                                 __n
/usr/include/c++/11/bits/char_traits.h: At global scope:
/usr/include/c++/11/bits/char_traits.h:166:31: error: ‘size_t’ in namespace ‘std’ does not name a type; did you mean ‘time_t’?
  166 |     _GLIBCXX14_CONSTEXPR std::size_t
      |                               ^~~~~~
      |                               time_t
/usr/include/c++/11/bits/char_traits.h:179:37: error: ‘std::size_t’ has not been declared
  179 |     find(const char_type* __s, std::size_t __n, const char_type&amp; __a)
      |                                     ^~~~~~
/usr/include/c++/11/bits/char_traits.h: In static member function ‘static const char_type* __gnu_cxx::char_traits&lt;_CharT&gt;::find(const char_type*, int, const char_type&amp;)’:
/usr/include/c++/11/bits/char_traits.h:181:17: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  181 |       for (std::size_t __i = 0; __i &lt; __n; ++__i)
      |                 ^~~~~~
      |                 time_t
/usr/include/c++/11/bits/char_traits.h:181:33: error: ‘__i’ was not declared in this scope; did you mean ‘__s’?
  181 |       for (std::size_t __i = 0; __i &lt; __n; ++__i)
      |                                 ^~~
      |                                 __s
/usr/include/c++/11/bits/char_traits.h: At global scope:
/usr/include/c++/11/bits/char_traits.h:191:55: error: ‘std::size_t’ has not been declared
  191 |     move(char_type* __s1, const char_type* __s2, std::size_t __n)
      |                                                       ^~~~~~
/usr/include/c++/11/bits/char_traits.h:241:55: error: ‘std::size_t’ has not been declared
  241 |     copy(char_type* __s1, const char_type* __s2, std::size_t __n)
      |                                                       ^~~~~~
/usr/include/c++/11/bits/char_traits.h:252:33: error: ‘std::size_t’ has not been declared
  252 |     assign(char_type* __s, std::size_t __n, char_type __a)
      |                                 ^~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/c++allocator.h:33,
                 from /usr/include/c++/11/bits/allocator.h:46,
                 from /usr/include/c++/11/string:41,
                 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.cc:2:
/usr/include/c++/11/ext/new_allocator.h:59:20: error: ‘size_t’ in namespace ‘std’ does not name a type; did you mean ‘time_t’?
   59 |       typedef std::size_t     size_type;
      |                    ^~~~~~
      |                    time_t
/usr/include/c++/11/ext/new_allocator.h:60:20: error: ‘ptrdiff_t’ in namespace ‘std’ does not name a type
   60 |       typedef std::ptrdiff_t  difference_type;
      |                    ^~~~~~~~~
/usr/include/c++/11/ext/new_allocator.h:103:16: error: ‘size_type’ has not been declared
  103 |       allocate(size_type __n, const void* = static_cast(0))
      |                ^~~~~~~~~
/usr/include/c++/11/ext/new_allocator.h:132:28: error: ‘size_type’ has not been declared
  132 |       deallocate(_Tp* __p, size_type __t __attribute__ ((__unused__)))
      |                            ^~~~~~~~~
/usr/include/c++/11/ext/new_allocator.h:153:7: error: ‘size_type’ does not name a type; did you mean ‘size_t’?
  153 |       size_type
      |       ^~~~~~~~~
      |       size_t
/usr/include/c++/11/ext/new_allocator.h:196:26: error: ‘size_type’ does not name a type; did you mean ‘size_t’?
  196 |       _GLIBCXX_CONSTEXPR size_type
      |                          ^~~~~~~~~
      |                          size_t
/usr/include/c++/11/ext/new_allocator.h: In member function ‘_Tp* __gnu_cxx::new_allocator&lt;_Tp&gt;::allocate(int, const void*)’:
/usr/include/c++/11/ext/new_allocator.h:115:29: error: ‘size_t’ is not a member of ‘std’; did you mean ‘time_t’?
  115 |             if (__n &gt; (std::size_t(-1) / sizeof(_Tp)))
      |                             ^~~~~~
      |                             time_t
In file included from /usr/include/c++/11/ext/alloc_traits.h:34,
                 from /usr/include/c++/11/bits/basic_string.h:40,
                 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.cc:2:
/usr/include/c++/11/bits/alloc_traits.h: At global scope:
/usr/include/c++/11/bits/alloc_traits.h:432:36: error: ‘ptrdiff_t’ in namespace ‘std’ does not name a type
  432 |       using difference_type = std::ptrdiff_t;
      |                                    ^~~~~~~~~
/usr/include/c++/11/bits/alloc_traits.h:435:30: error: ‘size_t’ in namespace ‘std’ does not name a type; did you mean ‘time_t’?
  435 |       using size_type = std::size_t;
      |                              ^~~~~~
      |                              time_t
/usr/include/c++/11/bits/alloc_traits.h:463:37: error: ‘size_type’ has not been declared
  463 |       allocate(allocator_type&amp; __a, size_type __n)
      |                                     ^~~~~~~~~
/usr/include/c++/11/bits/alloc_traits.h:477:37: error: ‘size_type’ has not been declared
  477 |       allocate(allocator_type&amp; __a, size_type __n, const_void_pointer __hint)
      |                                     ^~~~~~~~~
/usr/include/c++/11/bits/alloc_traits.h:495:52: error: ‘size_type’ has not been declared
  495 |       deallocate(allocator_type&amp; __a, pointer __p, size_type __n)
      |                                                    ^~~~~~~~~
/usr/include/c++/11/bits/alloc_traits.h:546:35: error: ‘size_type’ does not name a type; did you mean ‘true_type’?
  546 |       static _GLIBCXX20_CONSTEXPR size_type
      |                                   ^~~~~~~~~
      |                                   true_type
/usr/include/c++/11/bits/alloc_traits.h:589:36: error: ‘ptrdiff_t’ in namespace ‘std’ does not name a type
  589 |       using difference_type = std::ptrdiff_t;
      |                                    ^~~~~~~~~
/usr/include/c++/11/bits/alloc_traits.h:592:30: error: ‘size_t’ in namespace ‘std’ does not name a type; did you mean ‘time_t’?
  592 |       using size_type = std::size_t;
      |                              ^~~~~~
      |                              time_t
/usr/include/c++/11/bits/alloc_traits.h:614:33: error: ‘size_type’ has not been declared
  614 |       allocate(allocator_type&amp;, size_type, const void* = nullptr) = delete;
      |                                 ^~~~~~~~~
/usr/include/c++/11/bits/alloc_traits.h:618:42: error: ‘size_type’ has not been declared
</pre>
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