Eroare de compilare: user.cpp: In function ‘void add_event(int, int, int)’: user.cpp:108:32: error: invalid initialization of non-const reference of type ‘std::_Deque_iterator<std::pair<int, int>, std::pair<int, int>&, std::pair<int, int>*>&’ from an rvalue of type ‘std::_Deque_iterator<std::pair<int, int>, std::pair<int, int>&, std::pair<int, int>*>::_Self {aka std::_Deque_iterator<std::pair<int, int>, std::pair<int, int>&, std::pair<int, int>*>}’ for (auto& it = G[sala].end() - 1; it != G[sala].begin(); --it) { ^ user.cpp:84:7: warning: unused variable ‘insert’ [-Wunused-variable] bool insert = false; ^ user.cpp: In function ‘void seek_best_choice(int, event&)’: user.cpp:140:64: error: invalid initialization of non-const reference of type ‘std::_Deque_iterator<std::pair<int, int>, std::pair<int, int>&, std::pair<int, int>*>&’ from an rvalue of type ‘std::_Deque_iterator<std::pair<int, int>, std::pair<int, int>&, std::pair<int, int>*>’ auto& it = lower_bound(G[source].begin(), G[source].end(), cmp); ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:19: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<event*, std::vector<event> >; _Tp = event]’: /usr/include/c++/4.8/bits/stl_algo.h:2307:70: required from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<event*, std::vector<event> >]’ /usr/include/c++/4.8/bits/stl_algo.h:2338:54: required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<event*, std::vector<event> >; _Size = int]’ /usr/include/c++/4.8/bits/stl_algo.h:5475:36: required from ‘void std::sort(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<event*, std::vector<event> >]’ user.cpp:182:40: required from here /usr/include/c++/4.8/bits/stl_algo.h:2266:20: error: no match for ‘operator<’ (operand types are ‘event’ and ‘const event’) while (*__first < __pivot) ^ /usr/include/c++/4.8/bits/stl_algo.h:2266:20: note: candidates are: user.cpp:74:7: note: bool event::operator<(event&) bool operator<(event& other) { ^ user.cpp:74:7: note: no known conversion for argument 1 from ‘const event’ to ‘event&’ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:64:0, from /usr/include/c++/4.8/bits/stl_tree.h:61, from /usr/include/c++/4.8/map:60, from user.cpp:10: /usr/include/c++/4.8/bits/stl_pair.h:220:5: note: 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++/4.8/bits/stl_pair.h:220:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:19: /usr/include/c++/4.8/bits/stl_algo.h:2266:20: note: ‘event’ is not derived from ‘const std::pair<_T1, _T2>’ while (*__first < __pivot) ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0, from /usr/include/c++/4.8/bits/stl_tree.h:61, from /usr/include/c++/4.8/map:60, from user.cpp:10: /usr/include/c++/4.8/bits/stl_iterator.h:297:5: note: 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++/4.8/bits/stl_iterator.h:297:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:19: /usr/include/c++/4.8/bits/stl_algo.h:2266:20: note: ‘event’ is not derived from ‘const std::reverse_iterator<_Iterator>’