Language: C++

#include<bits/stdc++.h>
using namespce std;
int main(){
  int N;cin>>N;
  vector<int> a(N);
  for(int i=0;i<N;i++)cin>>a.at(i);
  sort(a.begin(),a.end());
  
  int M,T;cin>>N;
  int flag=0;
  for(int i=0;i<M;i++){
    cin>>T;
    for(int j=0;j<N;j++){
      if(T==a.at(j)){
        a.at(j).erase;
        N--;
      }
      else{
        flag++;
        i<0;
        break;
      }
    }
  }
  
  if(flag==0)cout<<"YES"<<endl;
  else cout<<"NO"<<endl;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namespce'
    2 | using namespce std;
      |       ^~~~~~~~
a.cc: In function 'int main()':
a.cc:4:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |   int N;cin>>N;
      |         ^~~
      |         std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:5:3: error: 'vector' was not declared in this scope
    5 |   vector<int> a(N);
      |   ^~~~~~
a.cc:5:3: note: suggested alternatives:
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53:
/usr/include/c++/14/bits/stl_vector.h:428:11: note:   'std::vector'
  428 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
/usr/include/c++/14/vector:93:13: note:   'std::pmr::vector'
   93 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
a.cc:5:10: error: expected primary-expression before 'int'
    5 |   vector<int> a(N);
      |          ^~~
a.cc:6:28: error: 'a' was not declared in this scope
    6 |   for(int i=0;i<N;i++)cin>>a.at(i);
      |                            ^
a.cc:7:8: error: 'a' was not declared in this scope
    7 |   sort(a.begin(),a.end());
      |        ^
a.cc:7:3: error: 'sort' was not declared in this scope; did you mean 'std::sort'?
    7 |   sort(a.begin(),a.end());
      |   ^~~~
      |   std::sort
In file included from /usr/include/c++/14/algorithm:86,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note: 'std::sort' declared here
  296 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last);
      | ^~~~
a.cc:26:14: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   26 |   if(flag==0)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:26:27: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   26 |   if(flag==0)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:27:8: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   27 |   else 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:27:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   27 |   else cout<<"NO"<<endl;
      |                    ^~~~
      |                    std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~