Submission #1217752

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217752		12baater	Arranging Shoes (IOI19_shoes)	C++20	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
#include <algorithm>
#include <vector>
using namespace std;
long long count = 0;
bool comp(const int a, const int b) {
	count++;
	if(abs(a)==abs(b)) return a<b;
	return abs(a) < abs(b);
}


long long count_swaps(std::vector<int> s) {
	sort(s.begin(),s.end(),comp);
	return count;
}

Compilation message (stderr)

shoes.cpp: In function 'bool comp(int, int)':
shoes.cpp:7:9: error: reference to 'count' is ambiguous
    7 |         count++;
      |         ^~~~~
In file included from /usr/include/c++/11/algorithm:74,
                 from shoes.cpp:2:
/usr/include/c++/11/pstl/glue_algorithm_defs.h:101:1: note: candidates are: 'template<class _ExecutionPolicy, class _ForwardIterator, class _Tp> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, typename std::iterator_traits<_II>::difference_type> std::count(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator, const _Tp&)'
  101 | count(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value);
      | ^~~~~
In file included from /usr/include/c++/11/vector:62,
                 from shoes.h:5,
                 from shoes.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:4059:5: note:                 'template<class _IIter, class _Tp> constexpr typename std::iterator_traits< <template-parameter-1-1> >::difference_type std::count(_IIter, _IIter, const _Tp&)'
 4059 |     count(_InputIterator __first, _InputIterator __last, const _Tp& __value)
      |     ^~~~~
shoes.cpp:5:11: note:                 'long long int count'
    5 | long long count = 0;
      |           ^~~~~
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:15:16: error: reference to 'count' is ambiguous
   15 |         return count;
      |                ^~~~~
In file included from /usr/include/c++/11/algorithm:74,
                 from shoes.cpp:2:
/usr/include/c++/11/pstl/glue_algorithm_defs.h:101:1: note: candidates are: 'template<class _ExecutionPolicy, class _ForwardIterator, class _Tp> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, typename std::iterator_traits<_II>::difference_type> std::count(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator, const _Tp&)'
  101 | count(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value);
      | ^~~~~
In file included from /usr/include/c++/11/vector:62,
                 from shoes.h:5,
                 from shoes.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:4059:5: note:                 'template<class _IIter, class _Tp> constexpr typename std::iterator_traits< <template-parameter-1-1> >::difference_type std::count(_IIter, _IIter, const _Tp&)'
 4059 |     count(_InputIterator __first, _InputIterator __last, const _Tp& __value)
      |     ^~~~~
shoes.cpp:5:11: note:                 'long long int count'
    5 | long long count = 0;
      |           ^~~~~