Eroare de compilare: main.cpp: In function 'void dfs(int)': main.cpp:16:15: error: no match for 'operator!=' (operand types are 'std::pair<int, int>' and 'int') if (v != p[nod]) ~~^~~~~~~~~ In file included from /usr/include/c++/6/regex:62:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/6/bits/regex.h:951:5: note: candidate: template<class _BiIter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const std::__cxx11::sub_match<_BiIter>&) operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) ^~~~~~~~ /usr/include/c++/6/bits/regex.h:951:5: note: template argument deduction/substitution failed: main.cpp:16:23: note: 'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>' if (v != p[nod]) ^ In file included from /usr/include/c++/6/regex:62:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/6/bits/regex.h:1029:5: note: candidate: template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const std::__cxx11::sub_match<_BiIter>&) operator!=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, ^~~~~~~~ /usr/include/c++/6/bits/regex.h:1029:5: note: template argument deduction/substitution failed: main.cpp:16:23: note: 'std::pair<int, int>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>' if (v != p[nod]) ^ In file included from /usr/include/c++/6/regex:62:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/6/bits/regex.h:1109:5: note: candidate: template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&) operator!=(const sub_match<_Bi_iter>& __lhs, ^~~~~~~~ /usr/include/c++/6/bits/regex.h:1109:5: note: template argument deduction/substitution failed: main.cpp:16:23: note: 'std::pair<int, int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>' if (v != p[nod]) ^ In file included from /usr/include/c++/6/regex:62:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/6/bits/regex.h:1186:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type*, const std::__cxx11::sub_match<_BiIter>&) operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs, ^~~~~~~~ /usr/include/c++/6/bits/regex.h:1186:5: note: template argument deduction/substitution failed: main.cpp:16:23: note: mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int' if (v != p[nod]) ^ In file included from /usr/include/c++/6/regex:62:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:110, from main.cpp:1: /usr/include/c++/6/bits/regex.h:1260:5: note: candidate: template<class _Bi_iter> bool std::__cxx11::operator!=(const std::__cxx11::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*) operator!=(const sub_match<_Bi_iter>& __lhs, ^~~~~~~~ Non zero exit status: 1