Language: C++

#include<iostream>
#include<string>

int main(){
	string s; cin>>s;
	if(s[0]=='A'&&s[1]=='A'&&s[2]=='A'){
    	cout<<"No"<<end;
    }else  if(s[0]=='B'&&s[1]=='B'&&s[2]=='B'){
       	cout<<"No"<<end;
    }else{ 
    	cout<<"Yes"<<endl;
    }
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'string' was not declared in this scope
    5 |         string s; cin>>s;
      |         ^~~~~~
a.cc:5:9: note: suggested alternatives:
In file included from /usr/include/c++/14/iosfwd:41,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:5:19: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |         string s; cin>>s;
      |                   ^~~
      |                   std::cin
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:5:24: error: 's' was not declared in this scope
    5 |         string s; cin>>s;
      |                        ^
a.cc:7:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |         cout<<"No"<<end;
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:7:21: error: 'end' was not declared in this scope; did you mean 'std::end'?
    7 |         cout<<"No"<<end;
      |                     ^~~
      |                     std::end
In file included from /usr/include/c++/14/string:53:
/usr/include/c++/14/bits/range_access.h:116:37: note: 'std::end' declared here
  116 |   template<typename _Tp> const _Tp* end(const valarray<_Tp>&) noexcept;
      |                                     ^~~
a.cc:9:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |         cout<<"No"<<end;
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:9:21: error: 'end' was not declared in this scope; did you mean 'std::end'?
    9 |         cout<<"No"<<end;
      |                     ^~~
      |                     std::end
/usr/include/c++/14/bits/range_access.h:116:37: note: 'std::end' declared here
  116 |   template<typename _Tp> const _Tp* end(const valarray<_Tp>&) noexcept;
      |                                     ^~~
a.cc:11:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 |         cout<<"Yes"<<endl;
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:11:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 |         cout<<"Yes"<<endl;
      |                      ^~~~
      |                      std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~