Eroare de compilare: main.cpp: In function 'int main()': main.cpp:28:31: error: type/value mismatch at argument 1 in template parameter list for 'template<class _Value, class _Hash, class _Pred, class _Alloc> class std::unordered_set' unordered_set<iterator>::it; ^ main.cpp:28:31: note: expected a type, got 'iterator' main.cpp:28:31: error: template argument 2 is invalid main.cpp:28:31: error: template argument 3 is invalid main.cpp:28:31: error: template argument 4 is invalid main.cpp:29:21: error: cannot convert 'std::unordered_set<long long int>::iterator {aka std::__detail::_Node_iterator<long long int, true, false>}' to 'int' in assignment it=fv.find(z); ^ main.cpp:30:14: error: no match for 'operator!=' (operand types are 'int' and 'std::unordered_set<long long int>::iterator {aka std::__detail::_Node_iterator<long long int, true, false>}') if(it!=fv.end()) ~~^~~~~~~~~~ In file included from /usr/include/c++/6/iosfwd:40:0, from /usr/include/c++/6/ios:38, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/bits/postypes.h:221:5: note: candidate: template<class _StateT> bool std::operator!=(const std::fpos<_StateT>&, const std::fpos<_StateT>&) operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs) ^~~~~~~~ /usr/include/c++/6/bits/postypes.h:221:5: note: template argument deduction/substitution failed: main.cpp:30:23: note: mismatched types 'const std::fpos<_StateT>' and 'int' if(it!=fv.end()) ^ In file included from /usr/include/c++/6/bits/stl_algobase.h:64:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/bits/stl_pair.h:448:5: note: candidate: template<class _T1, class _T2> constexpr bool std::operator!=(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&) operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:448:5: note: template argument deduction/substitution failed: main.cpp:30:23: note: mismatched types 'const std::pair<_T1, _T2>' and 'int' if(it!=fv.end()) ^ 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/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator.h:304:5: note: candidate: template<class _Iterator> bool 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:304:5: note: template argument deduction/substitution failed: main.cpp:30:23: note: mismatched types 'const std::reverse_iterator<_Iterator>' and 'int' Non zero exit status: 1