Compilare: In file included from /usr/include/c++/12.2.1/iostream:39, from main.cpp:3: In member function 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>]', inlined from 'int main()' at main.cpp:169:53: /usr/include/c++/12.2.1/ostream:202:25: warning: 'commonVertex' may be used uninitialized [-Wmaybe-uninitialized] 202 | { return _M_insert(__n); } | ~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:146:15: note: 'commonVertex' was declared here 146 | long long commonVertex; | ^~~~~~~~~~~~