Language: C++

#include <bits/stdc++.h> 
  using namespace std; 
int main(){
string S , T;
  cin >> S >> T ;
  
 for (int i = 0; i < T.size() - 1 ; i++){
   
   if (S[i] != T[i]){
     cout << "No" << endl;
     retern 0;
   }
   
 }     
   
  cout <<"Yes"<< endl;
}

Compiler output:
a.cc:2:2: error: extended character   is not valid in an identifier
    2 |   using namespace std;
      |  ^
a.cc:2:2: error: '\U000000a0using' does not name a type
    2 |   using namespace std;
      |  ^~~~~~
a.cc: In function 'int main()':
a.cc:4:1: error: 'string' was not declared in this scope
    4 | string S , T;
      | ^~~~~~
a.cc:4:1: 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:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin >> S >> T ;
      |   ^~~
      |   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:5:10: error: 'S' was not declared in this scope
    5 |   cin >> S >> T ;
      |          ^
a.cc:5:15: error: 'T' was not declared in this scope
    5 |   cin >> S >> T ;
      |               ^
a.cc:10:6: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 |      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:10:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   10 |      cout << "No" << 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:11:6: error: 'retern' was not declared in this scope; did you mean 'extern'?
   11 |      retern 0;
      |      ^~~~~~
      |      extern
a.cc:16:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   16 |   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:16:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   16 |   cout <<"Yes"<< endl;
      |                  ^~~~
      |                  std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~