Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:42:17: error: no match for ‘operator>=’ (operand types are ‘Interval’ and ‘int’) if (top >= N) ^ user.cpp:42:17: note: candidates are: In file included from /usr/include/c++/4.8/bits/stl_algobase.h:64:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/stl_pair.h:245:5: 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:245:5: note: template argument deduction/substitution failed: user.cpp:42:20: note: ‘Interval’ is not derived from ‘const std::pair<_T1, _T2>’ if (top >= N) ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/stl_iterator.h:321:5: 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:321:5: note: template argument deduction/substitution failed: user.cpp:42:20: note: ‘Interval’ is not derived from ‘const std::reverse_iterator<_Iterator>’ if (top >= N) ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/stl_iterator.h:371:5: note: 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++/4.8/bits/stl_iterator.h:371:5: note: template argument deduction/substitution failed: user.cpp:42:20: note: ‘Interval’ is not derived from ‘const std::reverse_iterator<_Iterator>’ if (top >= N) ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: