Language: C++

#include<iostream>
#include<vector>
#include<algorithm>
int main(){
	vector<int> a;
	int A;
	cin >> A; a.emplace_back(A);
	cin >> A; a.emplace_back(A);
	cin >> A; a.emplace_back(A);
	sort(a.begin(),a.end());
	if(a[0]==5 && a[1]==5 && a[2]==7)
		cout << "YES" <<endl;
	else
		cout << "NO" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'vector' was not declared in this scope
    5 |         vector<int> a;
      |         ^~~~~~
a.cc:5:9: note: suggested alternatives:
In file included from /usr/include/c++/14/vector:66,
                 from a.cc:2:
/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:5:16: error: expected primary-expression before 'int'
    5 |         vector<int> a;
      |                ^~~
a.cc:7:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |         cin >> A; a.emplace_back(A);
      |         ^~~
      |         std::cin
In file included 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:7:19: error: 'a' was not declared in this scope
    7 |         cin >> A; a.emplace_back(A);
      |                   ^
a.cc:10:9: error: 'sort' was not declared in this scope; did you mean 'std::sort'?
   10 |         sort(a.begin(),a.end());
      |         ^~~~
      |         std::sort
In file included from /usr/include/c++/14/algorithm:86,
                 from a.cc:3:
/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:12:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   12 |                 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:12:33: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   12 |                 cout << "YES" <<endl;
      |                                 ^~~~
      |                                 std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:14:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   14 |                 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:14:33: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   14 |                 cout << "NO" << endl;
      |                                 ^~~~
      |                                 std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~