Eroare de compilare: user.cpp: In function ‘void vecini(int, int)’: user.cpp:50:57: error: no match for ‘operator==’ (operand types are ‘std::set<int>::iterator {aka std::_Rb_tree_const_iterator<int>}’ and ‘int’) if (L[viz[i][j]*(-1)].find(viz[iv][jv]) == NULL){ ^ user.cpp:50:57: note: candidates are: In file included from /usr/include/c++/4.8/set:60:0, from user.cpp:2: /usr/include/c++/4.8/bits/stl_tree.h:298:7: note: bool std::_Rb_tree_const_iterator<_Tp>::operator==(const _Self&) const [with _Tp = int; std::_Rb_tree_const_iterator<_Tp>::_Self = std::_Rb_tree_const_iterator<int>] operator==(const _Self& __x) const ^ /usr/include/c++/4.8/bits/stl_tree.h:298:7: note: no known conversion for argument 1 from ‘int’ to ‘const _Self& {aka const std::_Rb_tree_const_iterator<int>&}’ In file included from /usr/include/c++/4.8/iosfwd:40:0, from /usr/include/c++/4.8/ios:38, 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/postypes.h:216:5: note: 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++/4.8/bits/postypes.h:216:5: note: template argument deduction/substitution failed: In file included from /usr/include/_G_config.h:15:0, from /usr/include/libio.h:32, from /usr/include/stdio.h:75, from /usr/include/c++/4.8/cstdio:42, from /usr/include/c++/4.8/ext/string_conversions.h:43, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: user.cpp:50:60: note: ‘std::set<int>::iterator {aka std::_Rb_tree_const_iterator<int>}’ is not derived from ‘const std::fpos<_StateT>’ if (L[viz[i][j]*(-1)].find(viz[iv][jv]) == NULL){ ^ 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:214:5: 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:214:5: note: template argument deduction/substitution failed: In file included from /usr/include/_G_config.h:15:0, from /usr/include/libio.h:32, from /usr/include/stdio.h:75, from /usr/include/c++/4.8/cstdio:42,