Language: C++

#include <iostream>
#include <vector>
#include <map>

using namespace std;

int n;
long long id[4000];
unsigned long long value[4000];
unsigned long long number[4000];
map<unsigned long long, unsigned long long> total;

int main() {
  while(true){
    cin >> n;
    if(n==0){
        return 0;
    }
    for (int i = 0; i < n; i++) {
        cin >> id[i] >> value[i] >> number[i];
        if(total.find(id[i])==total.end()){
          total.insert(make_pair(id[i], 0));
        }
        total[id[i]] += value[i] * number[i];
    }
    vector<long long> v;
    if(!total.empty()) {
        map<unsigned long long, unsigned long long>::iterator it = total.begin();
        while (it != total.end()) {
            if ((*it).second >= 1000000) {
                v.push_back((*it).first);
            }
            ++it;
        }
    }
    if (v.empty()) {
        cout << "NA" << endl;
    }
    for (vector<unsigned long long>::iterator it = v.begin(); it != v.end(); ++it) {
        cout << *it << endl;
    }
    v.clear();
    total.clear();
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:39:59: error: conversion from '__normal_iterator<long long int*,vector<long long int>>' to non-scalar type '__normal_iterator<long long unsigned int*,vector<long long unsigned int>>' requested
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.end(); ++it) {
      |                                                    ~~~~~~~^~
a.cc:39:66: error: no match for 'operator!=' (operand types are 'std::vector<long long unsigned int>::iterator' and 'std::vector<long long int>::iterator')
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.end(); ++it) {
      |                                                               ~~ ^~ ~~~~~~~
      |                                                               |          |
      |                                                               |          __normal_iterator<long long int*,vector<long long int>>
      |                                                               __normal_iterator<long long unsigned int*,vector<long long unsigned 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:1:
/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:39:75: note:   'std::vector<long long unsigned int>::iterator' is not derived from 'const std::fpos<_StateT>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   'std::vector<long long unsigned int>::iterator' is not derived from 'const std::allocator<_CharT>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   'std::vector<long long unsigned int>::iterator' is not derived from 'const std::reverse_iterator<_Iterator>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   'std::vector<long long unsigned int>::iterator' is not derived from 'const std::reverse_iterator<_Iterator>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   'std::vector<long long unsigned int>::iterator' is not derived from 'const std::move_iterator<_IteratorL>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   'std::vector<long long unsigned int>::iterator' is not derived from 'const std::move_iterator<_IteratorL>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   'std::vector<long long unsigned int>::iterator' is not derived from 'const std::pair<_T1, _T2>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   '__gnu_cxx::__normal_iterator<long long unsigned int*, std::vector<long long unsigned int> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   '__gnu_cxx::__normal_iterator<long long unsigned int*, std::vector<long long unsigned int> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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:39:75: note:   '__gnu_cxx::__normal_iterator<long long int*, std::vector<long long int> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.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>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3833:5: note:   template argument deduction/substitution failed:
a.cc:39:75: note:   'std::vector<long long unsigned int>::iterator' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.end(); ++it) {
      |                                                                           ^
/usr/include/c++/14/bits/basic_string.h:3847:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3847 |     operator!=(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3847:5: note:   template argument deduction/substitution failed:
a.cc:39:75: note:   mismatched types 'const _CharT*' and '__gnu_cxx::__normal_iterator<long long unsigned int*, std::vector<long long unsigned int> >'
   39 |     for (vector<unsigned long long>::iterator it = v.begin(); it != v.end(); +