Eroare de compilare: main.cpp: In function 'void Afisare()': main.cpp:28:54: error: no match for 'operator-' (operand types are 'std::unordered_map<int, int>::iterator {aka std::__detail::_Node_iterator<std::pair<const int, int>, false, false>}' and 'int') for (auto i = perechi.begin(); i != perechi.end()-1; ++i) fout << i->first << " " << i->second << " "; ~~~~~~~~~~~~~^~ In file included from /usr/include/c++/6/bits/stl_algobase.h:67:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator.h:333:5: note: candidate: template<class _Iterator> decltype ((__x.base() - __y.base())) std::operator-(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&) operator-(const reverse_iterator<_Iterator>& __x, ^~~~~~~~ /usr/include/c++/6/bits/stl_iterator.h:333:5: note: template argument deduction/substitution failed: main.cpp:28:55: note: 'std::unordered_map<int, int>::iterator {aka std::__detail::_Node_iterator<std::pair<const int, int>, false, false>}' is not derived from 'const std::reverse_iterator<_Iterator>' for (auto i = perechi.begin(); i != perechi.end()-1; ++i) fout << i->first << " " << i->second << " "; ^ In file included from /usr/include/c++/6/bits/stl_algobase.h:67:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator.h:387:5: note: candidate: template<class _IteratorL, class _IteratorR> decltype ((__y.base() - __x.base())) std::operator-(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&) operator-(const reverse_iterator<_IteratorL>& __x, ^~~~~~~~ /usr/include/c++/6/bits/stl_iterator.h:387:5: note: template argument deduction/substitution failed: main.cpp:28:55: note: 'std::unordered_map<int, int>::iterator {aka std::__detail::_Node_iterator<std::pair<const int, int>, false, false>}' is not derived from 'const std::reverse_iterator<_Iterator>' for (auto i = perechi.begin(); i != perechi.end()-1; ++i) fout << i->first << " " << i->second << " "; ^ In file included from /usr/include/c++/6/bits/stl_algobase.h:67:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator.h:1186:5: note: candidate: template<class _IteratorL, class _IteratorR> decltype ((__x.base() - __y.base())) std::operator-(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&) operator-(const move_iterator<_IteratorL>& __x, ^~~~~~~~ /usr/include/c++/6/bits/stl_iterator.h:1186:5: note: template argument deduction/substitution failed: main.cpp:28:55: note: 'std::unordered_map<int, int>::iterator {aka std::__detail::_Node_iterator<std::pair<const int, int>, false, false>}' is not derived from 'const std::move_iterator<_IteratorL>' for (auto i = perechi.begin(); i != perechi.end()-1; ++i) fout << i->first << " " << i->second << " "; ^ In file included from /usr/include/c++/6/bits/stl_algobase.h:67:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator.h:1193:5: note: candidate: template<class _Iterator> decltype ((__x.base() - __y.base())) std::operator-(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&) Non zero exit status: 1