Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:19:27: error: could not convert ‘h.std::unordered_set<_Value, _Hash, _Pred, _Alloc>::find<long long int, std::hash<long long int>, std::equal_to<long long int>, std::allocator<long long int> >((* &((std::unordered_set<long long int>::key_type)x)))’ from ‘std::unordered_set<long long int>::iterator {aka std::__detail::_Node_iterator<long long int, true, false>}’ to ‘bool’ if ( h.find(x) ) ++sol; ^