Eroare de compilare: main.cpp: In function 'elem update(int, int, int, int, int, int)': main.cpp:35:5: error: return-statement with no value, in function returning 'elem' [-fpermissive] return ; ^~~~~~ main.cpp:44:23: error: no match for 'operator<' (operand types are 'elem' and 'elem') if (aint[2*nod] < aint[2*nod+1] ) { ~~~~~~~~~~~~^~~~~~~~~~~~~~~ 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:441:5: 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:441:5: note: template argument deduction/substitution failed: main.cpp:44:37: note: 'elem' is not derived from 'const std::pair<_T1, _T2>' if (aint[2*nod] < aint[2*nod+1] ) { ^ 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:298:5: 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:298:5: note: template argument deduction/substitution failed: main.cpp:44:37: note: 'elem' is not derived from 'const std::reverse_iterator<_Iterator>' if (aint[2*nod] < aint[2*nod+1] ) { ^ 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:355:5: note: candidate: template<class _IteratorL, class _IteratorR> bool 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:355:5: note: template argument deduction/substitution failed: main.cpp:44:37: note: 'elem' is not derived from 'const std::reverse_iterator<_Iterator>' if (aint[2*nod] < aint[2*nod+1] ) { ^ 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, Non zero exit status: 1