Language: C++

#include <iostream>
#include <map>
#include <algorithm>
using namespace std;
int main() {
  int N, K;
  map<int> M;
  vector<int> C;
  cin >> N >> K;
  for(int i = 0; i < N; ++i) {
    int a;
    cin >> a;
    ++M[a];
  }
  for(auto p : M) {
    C.push_back(p.second);
  }
  sort(C.begin(), C.end());
  int d = (int)S.size() - K;
  cout << d > 0 ? C[d - 1] : 0  << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: error: wrong number of template arguments (1, should be at least 2)
    7 |   map<int> M;
      |          ^
In file included from /usr/include/c++/14/map:63,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_map.h:102:11: note: provided for 'template<class _Key, class _Tp, class _Compare, class _Alloc> class std::map'
  102 |     class map
      |           ^~~
a.cc:8:3: error: 'vector' was not declared in this scope
    8 |   vector<int> C;
      |   ^~~~~~
a.cc:4:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    3 | #include <algorithm>
  +++ |+#include <vector>
    4 | using namespace std;
a.cc:8:10: error: expected primary-expression before 'int'
    8 |   vector<int> C;
      |          ^~~
a.cc:13:8: error: invalid types 'int[int]' for array subscript
   13 |     ++M[a];
      |        ^
a.cc:15:16: error: 'begin' was not declared in this scope; did you mean 'std::begin'?
   15 |   for(auto p : M) {
      |                ^
      |                std::begin
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/range_access.h:114:37: note: 'std::begin' declared here
  114 |   template<typename _Tp> const _Tp* begin(const valarray<_Tp>&) noexcept;
      |                                     ^~~~~
a.cc:15:16: error: 'end' was not declared in this scope; did you mean 'std::end'?
   15 |   for(auto p : M) {
      |                ^
      |                std::end
/usr/include/c++/14/bits/range_access.h:116:37: note: 'std::end' declared here
  116 |   template<typename _Tp> const _Tp* end(const valarray<_Tp>&) noexcept;
      |                                     ^~~
a.cc:16:5: error: 'C' was not declared in this scope
   16 |     C.push_back(p.second);
      |     ^
a.cc:18:8: error: 'C' was not declared in this scope
   18 |   sort(C.begin(), C.end());
      |        ^
a.cc:19:16: error: 'S' was not declared in this scope
   19 |   int d = (int)S.size() - K;
      |                ^
a.cc:20:13: error: no match for 'operator>' (operand types are 'std::basic_ostream<char>' and 'int')
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |   ~~~~~~~~~ ^ ~
      |        |      |
      |        |      int
      |        std::basic_ostream<char>
a.cc:20:13: note: candidate: 'operator>(int, int)' (built-in)
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |   ~~~~~~~~~~^~~
a.cc:20:13: note:   no known conversion for argument 1 from 'std::basic_ostream<char>' to 'int'
In file included from /usr/include/c++/14/string:48:
/usr/include/c++/14/bits/stl_iterator.h:462:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  462 |     operator>(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:462:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'const std::reverse_iterator<_Iterator>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/bits/stl_iterator.h:507:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  507 |     operator>(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:507:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'const std::reverse_iterator<_Iterator>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1714 |     operator>(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'const std::move_iterator<_IteratorL>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1774 |     operator>(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'const std::move_iterator<_IteratorL>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/string:51:
/usr/include/c++/14/bits/stl_pair.h:1058:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator>(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1058 |     operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1058:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'const std::pair<_T1, _T2>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/usr/include/c++/14/string_view:695:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  695 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:695:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/string_view:702:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  702 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:702:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/string_view:710:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  710 |     operator> (__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:710:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/bits/basic_string.h:3915:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3915 |     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3915:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/bits/basic_string.h:3929:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3929 |     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3929:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/bits/basic_string.h:3942:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3942 |     operator>(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3942:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   mismatched types 'const _CharT*' and 'std::basic_ostream<char>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
In file included from /usr/include/c++/14/bits/memory_resource.h:47,
                 from /usr/include/c++/14/string:68:
/usr/include/c++/14/tuple:2619:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator>(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2619 |     operator>(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2619:5: note:   template argument deduction/substitution failed:
a.cc:20:15: note:   'std::basic_ostream<char>' is not derived from 'const std::tuple<_UTypes ...>'
   20 |   cout << d > 0 ? C[d - 1] : 0  << endl;
      |               ^
/usr/include/c++/14/bits/stl_map.h:1564:5: note: candidate: 'template<class