Language: C++

//
//  banned.cpp
//  learningCplusplus
//
//  Created by Tran Duc Chinh on 2020/04/04.
//  Copyright © 2020 Tran Duc Chinh. All rights reserved.
//

#include <iostream>
#include <map>
int main(int argc, const char* argv[]) {
  int n;

  std::cin >> n;
  std::map<long long, long long> m;
  long long A[n];
  for (int i = 0; i < n; i++) {
    std::cin >> A[i];
    if (m.find(A[i]) == m.end()) {
      m[A[i]] = 1;
    }
    else {
      m[A[i]] += 1;
    }
  }

  long long cnt = 0;
  for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
    cnt += (it->second-1)*(it->second)/2;
  }

  for (int i = 0; i < n; i++) {
    long long result = cnt - (m[A[i]]-1);
    std::cout << result << std::endl;
  }
}

Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:28:49: error: conversion from '_Rb_tree_iterator<pair<const long long int,long long int>>' to non-scalar type '_Rb_tree_iterator<pair<const int,int>>' requested
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                          ~~~~~~~^~
a.cc:28:56: error: no match for 'operator!=' (operand types are 'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} and 'std::map<long long int, long long int>::iterator' {aka 'std::_Rb_tree<long long int, std::pair<const long long int, long long int>, std::_Select1st<std::pair<const long long int, long long int> >, std::less<long long int>, std::allocator<std::pair<const long long int, long long int> > >::iterator'})
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                     ~~ ^~ ~~~~~~~
      |                                                     |          |
      |                                                     |          _Rb_tree_iterator<pair<const long long int,long long int>>
      |                                                     _Rb_tree_iterator<pair<const int,int>>
In file included from /usr/include/c++/14/iosfwd:42,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:9:
/usr/include/c++/14/bits/postypes.h:197:5: note: candidate: 'template<class _StateT> bool std::operator!=(const fpos<_StateT>&, const fpos<_StateT>&)'
  197 |     operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:197:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::fpos<_StateT>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
In file included from /usr/include/c++/14/string:43,
                 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:
/usr/include/c++/14/bits/allocator.h:243:5: note: candidate: 'template<class _T1, class _T2> bool std::operator!=(const allocator<_CharT>&, const allocator<_T2>&)'
  243 |     operator!=(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:243:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::allocator<_CharT>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
In file included from /usr/include/c++/14/string:48:
/usr/include/c++/14/bits/stl_iterator.h:455:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  455 |     operator!=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:455:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::reverse_iterator<_Iterator>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
/usr/include/c++/14/bits/stl_iterator.h:500:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  500 |     operator!=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:500:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::reverse_iterator<_Iterator>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1686 |     operator!=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::move_iterator<_IteratorL>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1753 |     operator!=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::move_iterator<_IteratorL>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
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:1052:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator!=(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1052 |     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1052:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::map<int, int>::iterator' {aka 'std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int> >, std::less<int>, std::allocator<std::pair<const int, int> > >::iterator'} is not derived from 'const std::pair<_T1, _T2>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
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:651:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  651 |     operator!=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:651:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::_Rb_tree_iterator<std::pair<const int, int> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
/usr/include/c++/14/string_view:658:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  658 |     operator!=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:658:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::_Rb_tree_iterator<std::pair<const int, int> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
/usr/include/c++/14/string_view:666:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  666 |     operator!=(__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:666:5: note:   template argument deduction/substitution failed:
a.cc:28:65: note:   'std::_Rb_tree_iterator<std::pair<const long long int, long long int> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   28 |   for (std::map<int, int>::iterator it = m.begin(); it != m.end(); it++) {
      |                                                                 ^
/usr/include/c++/14/bits/basic_string.h:3833:5: 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>&)'
 3833 |     operator!=(const basic_string<_CharT, _Traits, _Alloc>&