Compilare: main.cpp: In function 'void normalize(std::vector<std::pair<double, double> >&, std::vector<double>&)': main.cpp:95:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | for (i = 0; i + 1 < norm.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<<(double) [with _CharT = char; _Traits = std::char_traits<char>]', inlined from 'int main()' at main.cpp:336:80: /usr/include/c++/12.2.1/ostream:221:25: warning: 'sol.solution::y' may be used uninitialized [-Wmaybe-uninitialized] 221 | { return _M_insert(__f); } | ~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:323:14: note: 'sol.solution::y' was declared here 323 | solution sol; | ^~~ 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:336:64: /usr/include/c++/12.2.1/ostream:221:25: warning: 'sol.solution::x' may be used uninitialized [-Wmaybe-uninitialized] 221 | { return _M_insert(__f); } | ~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:323:14: note: 'sol.solution::x' was declared here 323 | solution sol; | ^~~ 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:336:45: /usr/include/c++/12.2.1/ostream:221:25: warning: 'sol.solution::dist' may be used uninitialized [-Wmaybe-uninitialized] 221 | { return _M_insert(__f); } | ~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:323:14: note: 'sol.solution::dist' was declared here 323 | solution sol; | ^~~