Compilare: main.cpp: In function 'double kruskal()': main.cpp:38:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i=0; i<drum.size(); i++) | ~^~~~~~~~~~~~ In file included from /usr/include/c++/12.2.1/istream:39, from /usr/include/c++/12.2.1/sstream:38, from /usr/include/c++/12.2.1/complex:45, from /usr/include/c++/12.2.1/ccomplex:39, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:54, from main.cpp:1: In member function 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char; _Traits = std::char_traits<char>]', inlined from 'int main()' at main.cpp:86:27: /usr/include/c++/12.2.1/ostream:221:25: warning: 'rez' may be used uninitialized [-Wmaybe-uninitialized] 221 | { return _M_insert(__f); } | ~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:55:12: note: 'rez' was declared here 55 | double rez; | ^~~