Language: C++

#include<bits/stdc++.h>
using namespace dtd;
string divide[4]={"dream","erase","eraser","dreamer"};
string s;
bool DFS(int n){
    if(n==s.size())return true;
    for(string i:divide){
        if(n+i.size()<=s.size()&&s.sbustr(n,i.size()==i)){
            if(DFS(n+i.size()))return true;
        }
    }
    return false;
}
int main(){
    cin>>S;
    cout<<DFS(0) ? "YES" :"NO"<<endl;
}

Compiler output:
a.cc:2:17: error: 'dtd' is not a namespace-name
    2 | using namespace dtd;
      |                 ^~~
a.cc:3:1: error: 'string' does not name a type; did you mean 'stdin'?
    3 | string divide[4]={"dream","erase","eraser","dreamer"};
      | ^~~~~~
      | stdin
a.cc:4:1: error: 'string' does not name a type; did you mean 'stdin'?
    4 | string s;
      | ^~~~~~
      | stdin
a.cc: In function 'bool DFS(int)':
a.cc:6:11: error: 's' was not declared in this scope
    6 |     if(n==s.size())return true;
      |           ^
a.cc:7:9: error: 'string' was not declared in this scope
    7 |     for(string i:divide){
      |         ^~~~~~
a.cc:7:9: 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:12:5: error: expected primary-expression before 'return'
   12 |     return false;
      |     ^~~~~~
a.cc:11:6: error: expected ';' before 'return'
   11 |     }
      |      ^
      |      ;
   12 |     return false;
      |     ~~~~~~
a.cc:12:5: error: expected primary-expression before 'return'
   12 |     return false;
      |     ^~~~~~
a.cc:11:6: error: expected ')' before 'return'
   11 |     }
      |      ^
      |      )
   12 |     return false;
      |     ~~~~~~
a.cc:7:8: note: to match this '('
    7 |     for(string i:divide){
      |        ^
a.cc: In function 'int main()':
a.cc:15:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   15 |     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:15:10: error: 'S' was not declared in this scope
   15 |     cin>>S;
      |          ^
a.cc:16:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   16 |     cout<<DFS(0) ? "YES" :"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:16:33: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   16 |     cout<<DFS(0) ? "YES" :"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: In function 'bool DFS(int)':
a.cc:13:1: warning: control reaches end of non-void function [-Wreturn-type]
   13 | }
      | ^