Language: C++

#include<iostream>
#include<map>
#include<algorithm>
using namespace std;
main(){
while(1){
int n,a,b,c;
cin>>n;
if(n==0) break;
map<long,int> m;
for(;n>0;n--){
cin>>a>>b>>c;
m.insert((long)b*c,a);
}
m.sort();
cout<<(m.begin()).first<<endl;
}
}
cout<<"NA"<<endl;
}

Compiler output:
a.cc:5:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    5 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:13:9: error: no matching function for call to 'std::map<long int, int>::insert(long int, int&)'
   13 | m.insert((long)b*c,a);
      | ~~~~~~~~^~~~~~~~~~~~~
In file included from /usr/include/c++/14/map:63,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_map.h:847:9: note: candidate: 'template<class _Pair> std::__enable_if_t<((bool)std::is_constructible<std::pair<const _Key, _Tp>, _Pair>::value), std::pair<typename std::_Rb_tree<_Key, std::pair<const _Key, _Tp>, std::_Select1st<std::pair<const _Key, _Tp> >, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> >::other>::iterator, bool> > std::map<_Key, _Tp, _Compare, _Alloc>::insert(_Pair&&) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >]'
  847 |         insert(_Pair&& __x)
      |         ^~~~~~
/usr/include/c++/14/bits/stl_map.h:847:9: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_map.h:924:9: note: candidate: 'template<class _Pair> std::__enable_if_t<((bool)std::is_constructible<std::pair<const _Key, _Tp>, _Pair>::value), typename std::_Rb_tree<_Key, std::pair<const _Key, _Tp>, std::_Select1st<std::pair<const _Key, _Tp> >, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> >::other>::iterator> std::map<_Key, _Tp, _Compare, _Alloc>::insert(const_iterator, _Pair&&) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >]'
  924 |         insert(const_iterator __position, _Pair&& __x)
      |         ^~~~~~
/usr/include/c++/14/bits/stl_map.h:924:9: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   cannot convert '(((long int)b) * ((long int)c))' (type 'long int') to type 'std::map<long int, int>::const_iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::const_iterator'}
   13 | m.insert((long)b*c,a);
      |          ~~~~~~~^~
/usr/include/c++/14/bits/stl_map.h:942:9: note: candidate: 'template<class _InputIterator> void std::map<_Key, _Tp, _Compare, _Alloc>::insert(_InputIterator, _InputIterator) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >]'
  942 |         insert(_InputIterator __first, _InputIterator __last)
      |         ^~~~~~
/usr/include/c++/14/bits/stl_map.h:942:9: note:   template argument deduction/substitution failed:
a.cc:13:9: note:   deduced conflicting types for parameter '_InputIterator' ('long int' and 'int')
   13 | m.insert((long)b*c,a);
      | ~~~~~~~~^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_map.h:661:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::insert_return_type std::map<_Key, _Tp, _Compare, _Alloc>::insert(node_type&&) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >; insert_return_type = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::insert_return_type; node_type = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::node_type]'
  661 |       insert(node_type&& __nh)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_map.h:661:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_map.h:666:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::iterator std::map<_Key, _Tp, _Compare, _Alloc>::insert(const_iterator, node_type&&) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >; iterator = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::iterator; const_iterator = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::const_iterator; node_type = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::node_type]'
  666 |       insert(const_iterator __hint, node_type&& __nh)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_map.h:666:29: note:   no known conversion for argument 1 from 'long int' to 'std::map<long int, int>::const_iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::const_iterator'}
  666 |       insert(const_iterator __hint, node_type&& __nh)
      |              ~~~~~~~~~~~~~~~^~~~~~
/usr/include/c++/14/bits/stl_map.h:834:7: note: candidate: 'std::pair<typename std::_Rb_tree<_Key, std::pair<const _Key, _Tp>, std::_Select1st<std::pair<const _Key, _Tp> >, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> >::other>::iterator, bool> std::map<_Key, _Tp, _Compare, _Alloc>::insert(const value_type&) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >; typename std::_Rb_tree<_Key, std::pair<const _Key, _Tp>, std::_Select1st<std::pair<const _Key, _Tp> >, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> >::other>::iterator = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::iterator; typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> >::other = std::allocator<std::pair<const long int, int> >; typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> > = __gnu_cxx::__alloc_traits<std::allocator<std::pair<const long int, int> >, std::pair<const long int, int> >::rebind<std::pair<const long int, int> >; typename _Alloc::value_type = std::pair<const long int, int>; value_type = std::pair<const long int, int>]'
  834 |       insert(const value_type& __x)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_map.h:834:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_map.h:841:7: note: candidate: 'std::pair<typename std::_Rb_tree<_Key, std::pair<const _Key, _Tp>, std::_Select1st<std::pair<const _Key, _Tp> >, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> >::other>::iterator, bool> std::map<_Key, _Tp, _Compare, _Alloc>::insert(value_type&&) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >; typename std::_Rb_tree<_Key, std::pair<const _Key, _Tp>, std::_Select1st<std::pair<const _Key, _Tp> >, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> >::other>::iterator = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::iterator; typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> >::other = std::allocator<std::pair<const long int, int> >; typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<std::pair<const _Key, _Tp> > = __gnu_cxx::__alloc_traits<std::allocator<std::pair<const long int, int> >, std::pair<const long int, int> >::rebind<std::pair<const long int, int> >; typename _Alloc::value_type = std::pair<const long int, int>; value_type = std::pair<const long int, int>]'
  841 |       insert(value_type&& __x)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_map.h:841:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_map.h:879:7: note: candidate: 'void std::map<_Key, _Tp, _Compare, _Alloc>::insert(std::initializer_list<std::pair<const _Key, _Tp> >) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >]'
  879 |       insert(std::initializer_list<value_type> __list)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_map.h:879:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_map.h:909:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::iterator std::map<_Key, _Tp, _Compare, _Alloc>::insert(const_iterator, const value_type&) [with _Key = long int; _Tp = int; _Compare = std::less<long int>; _Alloc = std::allocator<std::pair<const long int, int> >; iterator = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::iterator; const_iterator = std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::const_iterator; value_type = std::pair<const long int, int>]'
  909 |       insert(const_iterator __position, const value_type& __x)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_map.h:909:29: note:   no known conversion for argument 1 from 'long int' to 'std::map<long int, int>::const_iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, int>, std::_Select1st<std::pair<const long int, int> >, std::less<long int>, std::allocator<std::pair<const long int, int> > >::const_iterator'}
  909 |       insert(const_iterator __position, const value_type& __x)
      |              ~~~~~~~~~~~~~~~^~~~~~~~~~
/usr/include/c++/14/bits/stl_map.h:919:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::iterator std::map<_Key, _Tp, _Compare, _Alloc>::insert(const_iterator, va