Language: C++

#include<iostream>
#include<functional>
#include<string>
#include<map>
#include<queue>
#include<vector>
using namespace std;
typedef pair<string,int> P;
int main(){
	string s,temp;
	int x;
	priority_queue<int,vector<int>,greater<int>()> que;
	multimap<string,int> box;
	while(cin>>s>>x,x)
		box.insert(P(s,x));
	box.insert(P("zzzzzzz",0));
	multimap<string,int>::iterator ite;
	for(ite=box.begin();ite->second!=0;){
		temp=ite->first;
		que.push(ite->second);
		ite++;
		while(ite->first==temp){
			que.push(ite->second);
			ite++;
		}
		cout<<temp<<endl;
		cout<<que.top();
		que.pop();
		while(!que.empty()){
			cout<<' '<<que.top();
			que.pop();
		}
		cout<<endl;
	}
	return 0;
}

Compiler output:
In file included from /usr/include/c++/14/queue:66,
                 from a.cc:5:
/usr/include/c++/14/bits/stl_queue.h: In instantiation of 'class std::priority_queue<int, std::vector<int>, std::greater<int>()>':
a.cc:12:49:   required from here
   12 |         priority_queue<int,vector<int>,greater<int>()> que;
      |                                                        ^~~
/usr/include/c++/14/bits/stl_queue.h:538:18: error: data member 'std::priority_queue<int, std::vector<int>, std::greater<int>()>::comp' invalidly declared function type
  538 |       _Compare   comp;
      |                  ^~~~
a.cc: In function 'int main()':
a.cc:12:56: error: no matching function for call to 'std::priority_queue<int, std::vector<int>, std::greater<int>()>::priority_queue()'
   12 |         priority_queue<int,vector<int>,greater<int>()> que;
      |                                                        ^~~
/usr/include/c++/14/bits/stl_queue.h:691:9: note: candidate: 'template<class _InputIterator, class _Alloc, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(_InputIterator, _InputIterator, const _Compare&, _Sequence&&, const _Alloc&) [with _Alloc = _InputIterator; _Requires = _Alloc; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  691 |         priority_queue(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:691:9: note:   candidate expects 5 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:679:9: note: candidate: 'template<class _InputIterator, class _Alloc, class, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(_InputIterator, _InputIterator, const _Compare&, const _Sequence&, const _Alloc&) [with _Alloc = _InputIterator; <template-parameter-2-3> = _Alloc; _Requires = <template-parameter-1-3>; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  679 |         priority_queue(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:679:9: note:   candidate expects 5 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:671:9: note: candidate: 'template<class _InputIterator, class _Alloc, class, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(_InputIterator, _InputIterator, const _Compare&, const _Alloc&) [with _Alloc = _InputIterator; <template-parameter-2-3> = _Alloc; _Requires = <template-parameter-1-3>; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  671 |         priority_queue(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:671:9: note:   candidate expects 4 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:663:9: note: candidate: 'template<class _InputIterator, class _Alloc, class, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(_InputIterator, _InputIterator, const _Alloc&) [with _Alloc = _InputIterator; <template-parameter-2-3> = _Alloc; _Requires = <template-parameter-1-3>; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  663 |         priority_queue(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:663:9: note:   candidate expects 3 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:649:9: note: candidate: 'template<class _InputIterator, class> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(_InputIterator, _InputIterator, const _Compare&, _Sequence&&) [with <template-parameter-2-2> = _InputIterator; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  649 |         priority_queue(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:649:9: note:   candidate expects 4 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:638:9: note: candidate: 'template<class _InputIterator, class> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(_InputIterator, _InputIterator, const _Compare&, const _Sequence&) [with <template-parameter-2-2> = _InputIterator; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  638 |         priority_queue(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:638:9: note:   candidate expects 4 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:629:9: note: candidate: 'template<class _InputIterator, class> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(_InputIterator, _InputIterator, const _Compare&) [with <template-parameter-2-2> = _InputIterator; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  629 |         priority_queue(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:629:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:594:9: note: candidate: 'template<class _Alloc, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(std::priority_queue<_Tp, _Sequence, _Compare>&&, const _Alloc&) [with _Requires = _Alloc; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  594 |         priority_queue(priority_queue&& __q, const _Alloc& __a)
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:594:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:590:9: note: candidate: 'template<class _Alloc, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const std::priority_queue<_Tp, _Sequence, _Compare>&, const _Alloc&) [with _Requires = _Alloc; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  590 |         priority_queue(const priority_queue& __q, const _Alloc& __a)
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:590:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:585:9: note: candidate: 'template<class _Alloc, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const _Compare&, _Sequence&&, const _Alloc&) [with _Requires = _Alloc; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  585 |         priority_queue(const _Compare& __x, _Sequence&& __c, const _Alloc& __a)
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:585:9: note:   candidate expects 3 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:579:9: note: candidate: 'template<class _Alloc, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const _Compare&, const _Sequence&, const _Alloc&) [with _Requires = _Alloc; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  579 |         priority_queue(const _Compare& __x, const _Sequence& __c,
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:579:9: note:   candidate expects 3 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:573:9: note: candidate: 'template<class _Alloc, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const _Compare&, const _Alloc&) [with _Requires = _Alloc; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  573 |         priority_queue(const _Compare& __x, const _Alloc& __a)
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:573:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:569:9: note: candidate: 'template<class _Alloc, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const _Alloc&) [with _Requires = _Alloc; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  569 |         priority_queue(const _Alloc& __a)
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:569:9: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:554:9: note: candidate: 'template<class _Seq, class _Requires> std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue() [with _Requires = _Seq; _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  554 |         priority_queue()
      |         ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:554:9: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_queue.h:551:43: error: no type named 'type' in 'struct std::enable_if<false, void>'
  551 |       template<typename _Seq = _Sequence, typename _Requires = typename
      |                                           ^~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:563:7: note: candidate: 'std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const _Compare&, _Sequence&&) [with _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  563 |       priority_queue(const _Compare& __x, _Sequence&& __s = _Sequence())
      |       ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:563:7: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:558:7: note: candidate: 'std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const _Compare&, const _Sequence&) [with _Tp = int; _Sequence = std::vector<int>; _Compare = std::greater<int>()]'
  558 |       priority_queue(const _Compare& __x, const _Sequence& __s)
      |       ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:558:7: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:496:11: note: candidate: 'std::priority_queue<int, std::vector<int>, std::greater<int>()>::priority_queue(const std::priority_queue<int, std::vector<int>, std::greater<int>()>&)'
  496 |     class priority_queue
      |           ^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_queue.h:496:11: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:496:11: note: candidate: 'std::priority_queue<int, std::vector<int>, std::greater<int>()>::priority_queue(std::priority_queue<int, std::vector<int>, std::greater<int>()>&&)'
/