Eroare de compilare: user.cpp: In function ‘void Unite(int, int)’: user.cpp:48:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[x].size(); i++) ~~^~~~~~~~~~~~~ user.cpp: In function ‘void DFS(int, int)’: user.cpp:65:38: error: no match for ‘operator!=’ (operand types are ‘__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type {aka std::pair<int, int>}’ and ‘int’) if(G[node1][G[node1].size() - 1] != node2 || G[node2][G[node2].size() - 1] != node1) In file included from /usr/include/c++/6/iosfwd:40:0, from /usr/include/c++/6/ios:38, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from user.cpp:1: /usr/include/c++/6/bits/postypes.h:221:5: note: candidate: template<class _StateT> bool std::operator!=(const std::fpos<_StateT>&, const std::fpos<_StateT>&) operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs) ^~~~~~~~ /usr/include/c++/6/bits/postypes.h:221:5: note: template argument deduction/substitution failed: user.cpp:65:41: note: ‘__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type {aka std::pair<int, int>}’ is not derived from ‘const std::fpos<_StateT>’ if(G[node1][G[node1].size() - 1] != node2 || G[node2][G[node2].size() - 1] != node1) ^~~~~ 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 user.cpp:1: /usr/include/c++/6/bits/stl_pair.h:448:5: 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:448:5: note: template argument deduction/substitution failed: user.cpp:65:41: note: mismatched types ‘const std::pair<_T1, _T2>’ and ‘int’ if(G[node1][G[node1].size() - 1] != node2 || G[node2][G[node2].size() - 1] != node1) ^~~~~ 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/istream:38, from /usr/include/c++/6/fstream:38, from user.cpp:1: /usr/include/c++/6/bits/stl_iterator.h:304:5: 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:304:5: note: template argument deduction/substitution failed: user.cpp:65:41: note: ‘__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type {aka std::pair<int, int>}’ is not derived from ‘const std::reverse_iterator<_Iterator>’ if(G[node1][G[node1].size() - 1] != node2 || G[node2][G[node2].size() - 1] != node1) ^~~~~ 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/istream:38,