Eroare de compilare: main.cpp: In function 'int main()': main.cpp:37:21: error: no match for 'operator=' (operand types are 'std::pair<int, int>' and 'const value_type {aka const std::pair<int, std::pair<int, int> >}') mini=pq.top(); ^ 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/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/stl_pair.h:363:7: note: candidate: std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(typename std::conditional<std::__and_<std::is_copy_assignable<_Tp>, std::is_copy_assignable<_T2> >::value, const std::pair<_T1, _T2>&, const std::__wrap_nonesuch&>::type) [with _T1 = int; _T2 = int; typename std::conditional<std::__and_<std::is_copy_assignable<_Tp>, std::is_copy_assignable<_T2> >::value, const std::pair<_T1, _T2>&, const std::__wrap_nonesuch&>::type = const std::pair<int, int>&] operator=(typename conditional< ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:363:7: note: no known conversion for argument 1 from 'const value_type {aka const std::pair<int, std::pair<int, int> >}' to 'std::conditional<true, const std::pair<int, int>&, const std::__wrap_nonesuch&>::type {aka const std::pair<int, int>&}' /usr/include/c++/6/bits/stl_pair.h:380:7: note: candidate: std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(typename std::conditional<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__wrap_nonesuch&&>::type) [with _T1 = int; _T2 = int; typename std::conditional<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__wrap_nonesuch&&>::type = std::pair<int, int>&&] operator=(typename conditional< ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:380:7: note: no known conversion for argument 1 from 'const value_type {aka const std::pair<int, std::pair<int, int> >}' to 'std::conditional<true, std::pair<int, int>&&, std::__wrap_nonesuch&&>::type {aka std::pair<int, int>&&}' /usr/include/c++/6/bits/stl_pair.h:396:2: note: candidate: template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, const _U1&>, std::is_assignable<_T2&, const _U2&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(const std::pair<_U1, _U2>&) [with _U1 = _U1; _U2 = _U2; _T1 = int; _T2 = int] operator=(const pair<_U1, _U2>& __p) ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:396:2: note: template argument deduction/substitution failed: /usr/include/c++/6/bits/stl_pair.h: In substitution of 'template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, const _U1&>, std::is_assignable<_T2&, const _U2&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(const std::pair<_U1, _U2>&) [with _U1 = int; _U2 = std::pair<int, int>]': main.cpp:37:21: required from here /usr/include/c++/6/bits/stl_pair.h:396:2: error: no type named 'type' in 'struct std::enable_if<false, std::pair<int, int>&>' /usr/include/c++/6/bits/stl_pair.h:407:2: note: candidate: template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, _U1&&>, std::is_assignable<_T2&, _U2&&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(std::pair<_U1, _U2>&&) [with _U1 = _U1; _U2 = _U2; _T1 = int; _T2 = int] operator=(pair<_U1, _U2>&& __p) ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:407:2: note: template argument deduction/substitution failed: main.cpp:37:21: note: types 'std::pair<_T1, _T2>' and 'const value_type {aka const std::pair<int, std::pair<int, int> >}' have incompatible cv-qualifiers mini=pq.top(); ^ main.cpp:4:11: error: request for member 'second' in 'mini.std::pair<int, int>::second', which is of non-class type 'int' #define s second ^ main.cpp:40:24: note: in expansion of macro 's' if (viz[mini.s.s]==0) ^ main.cpp:4:11: error: request for member 'second' in 'mini.std::pair<int, int>::second', which is of non-class type 'int' #define s second ^ main.cpp:42:24: note: in expansion of macro 's' viz[mini.s.s]=1; ^ main.cpp:4:11: error: request for member 'second' in 'mini.std::pair<int, int>::second', which is of non-class type 'int' #define s second ^ main.cpp:44:22: note: in expansion of macro 's' p[mini.s.s]=mini.s.f; ^ Non zero exit status: 1