Language: C++

#include <bits/stdc++.h>
uisng namespace std;
int main()
{
    string s="2019/04/30";
    string p;
    cin>>p;
    if (p==s){
        cout<<"Heisei";
    }
    else cout<<"TBD";
    cout<<endl;
    return 0;
}

Compiler output:
a.cc:2:1: error: 'uisng' does not name a type
    2 | uisng namespace std;
      | ^~~~~
a.cc: In function 'int main()':
a.cc:5:5: error: 'string' was not declared in this scope
    5 |     string s="2019/04/30";
      |     ^~~~~~
a.cc:5:5: 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:6:11: error: expected ';' before 'p'
    6 |     string p;
      |           ^~
      |           ;
a.cc:7:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |     cin>>p;
      |     ^~~
      |     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:7:10: error: 'p' was not declared in this scope
    7 |     cin>>p;
      |          ^
a.cc:8:12: error: 's' was not declared in this scope
    8 |     if (p==s){
      |            ^
a.cc:9:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |         cout<<"Heisei";
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:11:10: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 |     else cout<<"TBD";
      |          ^~~~
      |          std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:12:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   12 |     cout<<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:12:11: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   12 |     cout<<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)
      |     ^~~~