Language: C++

#include <bits/stdc++.h>
int main(){
  string s;
  cin>>s;
  
  if(s=='abc'||s=='bac'||s=='acb'||s=='bca'||s=='cab'||s=='cba')
    cout<<"Yes"<<endl;
  else
    cout<<"No"<<endl;
}

Compiler output:
a.cc:6:9: warning: multi-character character constant [-Wmultichar]
    6 |   if(s=='abc'||s=='bac'||s=='acb'||s=='bca'||s=='cab'||s=='cba')
      |         ^~~~~
a.cc:6:19: warning: multi-character character constant [-Wmultichar]
    6 |   if(s=='abc'||s=='bac'||s=='acb'||s=='bca'||s=='cab'||s=='cba')
      |                   ^~~~~
a.cc:6:29: warning: multi-character character constant [-Wmultichar]
    6 |   if(s=='abc'||s=='bac'||s=='acb'||s=='bca'||s=='cab'||s=='cba')
      |                             ^~~~~
a.cc:6:39: warning: multi-character character constant [-Wmultichar]
    6 |   if(s=='abc'||s=='bac'||s=='acb'||s=='bca'||s=='cab'||s=='cba')
      |                                       ^~~~~
a.cc:6:49: warning: multi-character character constant [-Wmultichar]
    6 |   if(s=='abc'||s=='bac'||s=='acb'||s=='bca'||s=='cab'||s=='cba')
      |                                                 ^~~~~
a.cc:6:59: warning: multi-character character constant [-Wmultichar]
    6 |   if(s=='abc'||s=='bac'||s=='acb'||s=='bca'||s=='cab'||s=='cba')
      |                                                           ^~~~~
a.cc: In function 'int main()':
a.cc:3:3: error: 'string' was not declared in this scope
    3 |   string s;
      |   ^~~~~~
a.cc:3:3: note: suggested alternatives:
In file included from /usr/include/c++/14/string:41,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:4:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |   cin>>s;
      |   ^~~
      |   std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:4:8: error: 's' was not declared in this scope
    4 |   cin>>s;
      |        ^
a.cc:7:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |     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:7:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |     cout<<"Yes"<<endl;
      |                  ^~~~
      |                  std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:9:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |     cout<<"No"<<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:9:17: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |     cout<<"No"<<endl;
      |                 ^~~~
      |                 std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~