Compilare: main.cpp: In function 'void normalize(std::vector<std::pair<long long int, long long int> >&, std::vector<long long int>&)': main.cpp:90:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 90 | for (i = 0; i + 1 < norm.size(); i++) | ~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'solution ok(long long int)': main.cpp:268:9: warning: variable 'ax1' set but not used [-Wunused-but-set-variable] 268 | int ax1, ax2; | ^~~ main.cpp:268:14: warning: variable 'ax2' set but not used [-Wunused-but-set-variable] 268 | int ax1, ax2; | ^~~ 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:328:80: /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:315:14: note: 'sol.solution::y' was declared here 315 | 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:328:64: /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:315:14: note: 'sol.solution::x' was declared here 315 | 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:328:45: /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:315:14: note: 'sol.solution::dist' was declared here 315 | solution sol; | ^~~