Compilare: main.cpp: In function 'long long int dfs(long long int, long long int)': main.cpp:34:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<lant>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for ( int i = 0 ; i < adj [ nod ] .size() ; i ++ ) | ~~^~~~~~~~~~~~~~~~~~~~~ In file included from /usr/include/c++/12.2.1/istream:39, from /usr/include/c++/12.2.1/fstream:38, from main.cpp:1: 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:90:28: /usr/include/c++/12.2.1/ostream:202:25: warning: 'rez' may be used uninitialized [-Wmaybe-uninitialized] 202 | { return _M_insert(__n); } | ~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:78:30: note: 'rez' was declared here 78 | long long st = 0 , dr = k , rez ; | ^~~